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<?php
/**
* WordPress API for media display.
*
* @package WordPress
* @subpackage Media
*/
/**
* Retrieve additional image sizes.
*
* @since 4.7.0
*
* @global array $_wp_additional_image_sizes
*
* @return array Additional images size data.
*/
function wp_get_additional_image_sizes() {
global $_wp_additional_image_sizes;
if ( ! $_wp_additional_image_sizes ) {
$_wp_additional_image_sizes = array();
}
return $_wp_additional_image_sizes;
}
/**
* Scale down the default size of an image.
*
* This is so that the image is a better fit for the editor and theme.
*
* The `$size` parameter accepts either an array or a string. The supported string
* values are 'thumb' or 'thumbnail' for the given thumbnail size or defaults at
* 128 width and 96 height in pixels. Also supported for the string value is
* 'medium', 'medium_large' and 'full'. The 'full' isn't actually supported, but any value other
* than the supported will result in the content_width size or 500 if that is
* not set.
*
* Finally, there is a filter named {@see 'editor_max_image_size'}, that will be
* called on the calculated array for width and height, respectively. The second
* parameter will be the value that was in the $size parameter. The returned
* type for the hook is an array with the width as the first element and the
* height as the second element.
*
* @since 2.5.0
*
* @global int $content_width
*
* @param int $width Width of the image in pixels.
* @param int $height Height of the image in pixels.
* @param string|array $size Optional. Image size. Accepts any valid image size, or an array
* of width and height values in pixels (in that order).
* Default 'medium'.
* @param string $context Optional. Could be 'display' (like in a theme) or 'edit'
* (like inserting into an editor). Default null.
* @return array Width and height of what the result image should resize to.
*/
function image_constrain_size_for_editor( $width, $height, $size = 'medium', $context = null ) {
global $content_width;
$_wp_additional_image_sizes = wp_get_additional_image_sizes();
if ( ! $context ) {
$context = is_admin() ? 'edit' : 'display';
}
if ( is_array( $size ) ) {
$max_width = $size[0];
$max_height = $size[1];
} elseif ( $size == 'thumb' || $size == 'thumbnail' ) {
$max_width = intval( get_option( 'thumbnail_size_w' ) );
$max_height = intval( get_option( 'thumbnail_size_h' ) );
// last chance thumbnail size defaults
if ( ! $max_width && ! $max_height ) {
$max_width = 128;
$max_height = 96;
}
} elseif ( $size == 'medium' ) {
$max_width = intval( get_option( 'medium_size_w' ) );
$max_height = intval( get_option( 'medium_size_h' ) );
} elseif ( $size == 'medium_large' ) {
$max_width = intval( get_option( 'medium_large_size_w' ) );
$max_height = intval( get_option( 'medium_large_size_h' ) );
if ( intval( $content_width ) > 0 ) {
$max_width = min( intval( $content_width ), $max_width );
}
} elseif ( $size == 'large' ) {
/*
* We're inserting a large size image into the editor. If it's a really
* big image we'll scale it down to fit reasonably within the editor
* itself, and within the theme's content width if it's known. The user
* can resize it in the editor if they wish.
*/
$max_width = intval( get_option( 'large_size_w' ) );
$max_height = intval( get_option( 'large_size_h' ) );
if ( intval( $content_width ) > 0 ) {
$max_width = min( intval( $content_width ), $max_width );
}
} elseif ( ! empty( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ) ) ) {
$max_width = intval( $_wp_additional_image_sizes[ $size ]['width'] );
$max_height = intval( $_wp_additional_image_sizes[ $size ]['height'] );
// Only in admin. Assume that theme authors know what they're doing.
if ( intval( $content_width ) > 0 && 'edit' === $context ) {
$max_width = min( intval( $content_width ), $max_width );
}
} // $size == 'full' has no constraint
else {
$max_width = $width;
$max_height = $height;
}
/**
* Filters the maximum image size dimensions for the editor.
*
* @since 2.5.0
*
* @param array $max_image_size An array with the width as the first element,
* and the height as the second element.
* @param string|array $size Size of what the result image should be.
* @param string $context The context the image is being resized for.
* Possible values are 'display' (like in a theme)
* or 'edit' (like inserting into an editor).
*/
list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size, $context );
return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
}
/**
* Retrieve width and height attributes using given width and height values.
*
* Both attributes are required in the sense that both parameters must have a
* value, but are optional in that if you set them to false or null, then they
* will not be added to the returned string.
*
* You can set the value using a string, but it will only take numeric values.
* If you wish to put 'px' after the numbers, then it will be stripped out of
* the return.
*
* @since 2.5.0
*
* @param int|string $width Image width in pixels.
* @param int|string $height Image height in pixels.
* @return string HTML attributes for width and, or height.
*/
function image_hwstring( $width, $height ) {
$out = '';
if ( $width ) {
$out .= 'width="' . intval( $width ) . '" ';
}
if ( $height ) {
$out .= 'height="' . intval( $height ) . '" ';
}
return $out;
}
/**
* Scale an image to fit a particular size (such as 'thumb' or 'medium').
*
* Array with image url, width, height, and whether is intermediate size, in
* that order is returned on success is returned. $is_intermediate is true if
* $url is a resized image, false if it is the original.
*
* The URL might be the original image, or it might be a resized version. This
* function won't create a new resized copy, it will just return an already
* resized one if it exists.
*
* A plugin may use the {@see 'image_downsize'} filter to hook into and offer image
* resizing services for images. The hook must return an array with the same
* elements that are returned in the function. The first element being the URL
* to the new image that was resized.
*
* @since 2.5.0
*
* @param int $id Attachment ID for image.
* @param array|string $size Optional. Image size to scale to. Accepts any valid image size,
* or an array of width and height values in pixels (in that order).
* Default 'medium'.
* @return false|array Array containing the image URL, width, height, and boolean for whether
* the image is an intermediate size. False on failure.
*/
function image_downsize( $id, $size = 'medium' ) {
$is_image = wp_attachment_is_image( $id );
/**
* Filters whether to preempt the output of image_downsize().
*
* Passing a truthy value to the filter will effectively short-circuit
* down-sizing the image, returning that value as output instead.
*
* @since 2.5.0
*
* @param bool $downsize Whether to short-circuit the image downsize. Default false.
* @param int $id Attachment ID for image.
* @param array|string $size Size of image. Image size or array of width and height values (in that order).
* Default 'medium'.
*/
if ( $out = apply_filters( 'image_downsize', false, $id, $size ) ) {
return $out;
}
$img_url = wp_get_attachment_url( $id );
$meta = wp_get_attachment_metadata( $id );
$width = $height = 0;
$is_intermediate = false;
$img_url_basename = wp_basename( $img_url );
// If the file isn't an image, attempt to replace its URL with a rendered image from its meta.
// Otherwise, a non-image type could be returned.
if ( ! $is_image ) {
if ( ! empty( $meta['sizes'] ) ) {
$img_url = str_replace( $img_url_basename, $meta['sizes']['full']['file'], $img_url );
$img_url_basename = $meta['sizes']['full']['file'];
$width = $meta['sizes']['full']['width'];
$height = $meta['sizes']['full']['height'];
} else {
return false;
}
}
// try for a new style intermediate size
if ( $intermediate = image_get_intermediate_size( $id, $size ) ) {
$img_url = str_replace( $img_url_basename, $intermediate['file'], $img_url );
$width = $intermediate['width'];
$height = $intermediate['height'];
$is_intermediate = true;
} elseif ( $size == 'thumbnail' ) {
// fall back to the old thumbnail
if ( ( $thumb_file = wp_get_attachment_thumb_file( $id ) ) && $info = getimagesize( $thumb_file ) ) {
$img_url = str_replace( $img_url_basename, wp_basename( $thumb_file ), $img_url );
$width = $info[0];
$height = $info[1];
$is_intermediate = true;
}
}
if ( ! $width && ! $height && isset( $meta['width'], $meta['height'] ) ) {
// any other type: use the real image
$width = $meta['width'];
$height = $meta['height'];
}
if ( $img_url ) {
// we have the actual image size, but might need to further constrain it if content_width is narrower
list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
return array( $img_url, $width, $height, $is_intermediate );
}
return false;
}
/**
* Register a new image size.
*
* Cropping behavior for the image size is dependent on the value of $crop:
* 1. If false (default), images will be scaled, not cropped.
* 2. If an array in the form of array( x_crop_position, y_crop_position ):
* - x_crop_position accepts 'left' 'center', or 'right'.
* - y_crop_position accepts 'top', 'center', or 'bottom'.
* Images will be cropped to the specified dimensions within the defined crop area.
* 3. If true, images will be cropped to the specified dimensions using center positions.
*
* @since 2.9.0
*
* @global array $_wp_additional_image_sizes Associative array of additional image sizes.
*
* @param string $name Image size identifier.
* @param int $width Image width in pixels.
* @param int $height Image height in pixels.
* @param bool|array $crop Optional. Whether to crop images to specified width and height or resize.
* An array can specify positioning of the crop area. Default false.
*/
function add_image_size( $name, $width = 0, $height = 0, $crop = false ) {
global $_wp_additional_image_sizes;
$_wp_additional_image_sizes[ $name ] = array(
'width' => absint( $width ),
'height' => absint( $height ),
'crop' => $crop,
);
}
/**
* Check if an image size exists.
*
* @since 3.9.0
*
* @param string $name The image size to check.
* @return bool True if the image size exists, false if not.
*/
function has_image_size( $name ) {
$sizes = wp_get_additional_image_sizes();
return isset( $sizes[ $name ] );
}
/**
* Remove a new image size.
*
* @since 3.9.0
*
* @global array $_wp_additional_image_sizes
*
* @param string $name The image size to remove.
* @return bool True if the image size was successfully removed, false on failure.
*/
function remove_image_size( $name ) {
global $_wp_additional_image_sizes;
if ( isset( $_wp_additional_image_sizes[ $name ] ) ) {
unset( $_wp_additional_image_sizes[ $name ] );
return true;
}
return false;
}
/**
* Registers an image size for the post thumbnail.
*
* @since 2.9.0
*
* @see add_image_size() for details on cropping behavior.
*
* @param int $width Image width in pixels.
* @param int $height Image height in pixels.
* @param bool|array $crop Optional. Whether to crop images to specified width and height or resize.
* An array can specify positioning of the crop area. Default false.
*/
function set_post_thumbnail_size( $width = 0, $height = 0, $crop = false ) {
add_image_size( 'post-thumbnail', $width, $height, $crop );
}
/**
* Gets an img tag for an image attachment, scaling it down if requested.
*
* The {@see 'get_image_tag_class'} filter allows for changing the class name for the
* image without having to use regular expressions on the HTML content. The
* parameters are: what WordPress will use for the class, the Attachment ID,
* image align value, and the size the image should be.
*
* The second filter, {@see 'get_image_tag'}, has the HTML content, which can then be
* further manipulated by a plugin to change all attribute values and even HTML
* content.
*
* @since 2.5.0
*
* @param int $id Attachment ID.
* @param string $alt Image Description for the alt attribute.
* @param string $title Image Description for the title attribute.
* @param string $align Part of the class name for aligning the image.
* @param string|array $size Optional. Registered image size to retrieve a tag for. Accepts any
* valid image size, or an array of width and height values in pixels
* (in that order). Default 'medium'.
* @return string HTML IMG element for given image attachment
*/
function get_image_tag( $id, $alt, $title, $align, $size = 'medium' ) {
list( $img_src, $width, $height ) = image_downsize( $id, $size );
$hwstring = image_hwstring( $width, $height );
$title = $title ? 'title="' . esc_attr( $title ) . '" ' : '';
$class = 'align' . esc_attr( $align ) . ' size-' . esc_attr( $size ) . ' wp-image-' . $id;
/**
* Filters the value of the attachment's image tag class attribute.
*
* @since 2.6.0
*
* @param string $class CSS class name or space-separated list of classes.
* @param int $id Attachment ID.
* @param string $align Part of the class name for aligning the image.
* @param string|array $size Size of image. Image size or array of width and height values (in that order).
* Default 'medium'.
*/
$class = apply_filters( 'get_image_tag_class', $class, $id, $align, $size );
$html = '<img src="' . esc_attr( $img_src ) . '" alt="' . esc_attr( $alt ) . '" ' . $title . $hwstring . 'class="' . $class . '" />';
/**
* Filters the HTML content for the image tag.
*
* @since 2.6.0
*
* @param string $html HTML content for the image.
* @param int $id Attachment ID.
* @param string $alt Alternate text.
* @param string $title Attachment title.
* @param string $align Part of the class name for aligning the image.
* @param string|array $size Size of image. Image size or array of width and height values (in that order).
* Default 'medium'.
*/
return apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
}
/**
* Calculates the new dimensions for a down-sampled image.
*
* If either width or height are empty, no constraint is applied on
* that dimension.
*
* @since 2.5.0
*
* @param int $current_width Current width of the image.
* @param int $current_height Current height of the image.
* @param int $max_width Optional. Max width in pixels to constrain to. Default 0.
* @param int $max_height Optional. Max height in pixels to constrain to. Default 0.
* @return array First item is the width, the second item is the height.
*/
function wp_constrain_dimensions( $current_width, $current_height, $max_width = 0, $max_height = 0 ) {
if ( ! $max_width && ! $max_height ) {
return array( $current_width, $current_height );
}
$width_ratio = $height_ratio = 1.0;
$did_width = $did_height = false;
if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) {
$width_ratio = $max_width / $current_width;
$did_width = true;
}
if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) {
$height_ratio = $max_height / $current_height;
$did_height = true;
}
// Calculate the larger/smaller ratios
$smaller_ratio = min( $width_ratio, $height_ratio );
$larger_ratio = max( $width_ratio, $height_ratio );
if ( (int) round( $current_width * $larger_ratio ) > $max_width || (int) round( $current_height * $larger_ratio ) > $max_height ) {
// The larger ratio is too big. It would result in an overflow.
$ratio = $smaller_ratio;
} else {
// The larger ratio fits, and is likely to be a more "snug" fit.
$ratio = $larger_ratio;
}
// Very small dimensions may result in 0, 1 should be the minimum.
$w = max( 1, (int) round( $current_width * $ratio ) );
$h = max( 1, (int) round( $current_height * $ratio ) );
// Sometimes, due to rounding, we'll end up with a result like this: 465x700 in a 177x177 box is 117x176... a pixel short
// We also have issues with recursive calls resulting in an ever-changing result. Constraining to the result of a constraint should yield the original result.
// Thus we look for dimensions that are one pixel shy of the max value and bump them up
// Note: $did_width means it is possible $smaller_ratio == $width_ratio.
if ( $did_width && $w == $max_width - 1 ) {
$w = $max_width; // Round it up
}
// Note: $did_height means it is possible $smaller_ratio == $height_ratio.
if ( $did_height && $h == $max_height - 1 ) {
$h = $max_height; // Round it up
}
/**
* Filters dimensions to constrain down-sampled images to.
*
* @since 4.1.0
*
* @param array $dimensions The image width and height.
* @param int $current_width The current width of the image.
* @param int $current_height The current height of the image.
* @param int $max_width The maximum width permitted.
* @param int $max_height The maximum height permitted.
*/
return apply_filters( 'wp_constrain_dimensions', array( $w, $h ), $current_width, $current_height, $max_width, $max_height );
}
/**
* Retrieves calculated resize dimensions for use in WP_Image_Editor.
*
* Calculates dimensions and coordinates for a resized image that fits
* within a specified width and height.
*
* Cropping behavior is dependent on the value of $crop:
* 1. If false (default), images will not be cropped.
* 2. If an array in the form of array( x_crop_position, y_crop_position ):
* - x_crop_position accepts 'left' 'center', or 'right'.
* - y_crop_position accepts 'top', 'center', or 'bottom'.
* Images will be cropped to the specified dimensions within the defined crop area.
* 3. If true, images will be cropped to the specified dimensions using center positions.
*
* @since 2.5.0
*
* @param int $orig_w Original width in pixels.
* @param int $orig_h Original height in pixels.
* @param int $dest_w New width in pixels.
* @param int $dest_h New height in pixels.
* @param bool|array $crop Optional. Whether to crop image to specified width and height or resize.
* An array can specify positioning of the crop area. Default false.
* @return false|array False on failure. Returned array matches parameters for `imagecopyresampled()`.
*/
function image_resize_dimensions( $orig_w, $orig_h, $dest_w, $dest_h, $crop = false ) {
if ( $orig_w <= 0 || $orig_h <= 0 ) {
return false;
}
// at least one of dest_w or dest_h must be specific
if ( $dest_w <= 0 && $dest_h <= 0 ) {
return false;
}
/**
* Filters whether to preempt calculating the image resize dimensions.
*
* Passing a non-null value to the filter will effectively short-circuit
* image_resize_dimensions(), returning that value instead.
*
* @since 3.4.0
*
* @param null|mixed $null Whether to preempt output of the resize dimensions.
* @param int $orig_w Original width in pixels.
* @param int $orig_h Original height in pixels.
* @param int $dest_w New width in pixels.
* @param int $dest_h New height in pixels.
* @param bool|array $crop Whether to crop image to specified width and height or resize.
* An array can specify positioning of the crop area. Default false.
*/
$output = apply_filters( 'image_resize_dimensions', null, $orig_w, $orig_h, $dest_w, $dest_h, $crop );
if ( null !== $output ) {
return $output;
}
if ( $crop ) {
// crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
$aspect_ratio = $orig_w / $orig_h;
$new_w = min( $dest_w, $orig_w );
$new_h = min( $dest_h, $orig_h );
if ( ! $new_w ) {
$new_w = (int) round( $new_h * $aspect_ratio );
}
if ( ! $new_h ) {
$new_h = (int) round( $new_w / $aspect_ratio );
}
$size_ratio = max( $new_w / $orig_w, $new_h / $orig_h );
$crop_w = round( $new_w / $size_ratio );
$crop_h = round( $new_h / $size_ratio );
if ( ! is_array( $crop ) || count( $crop ) !== 2 ) {
$crop = array( 'center', 'center' );
}
list( $x, $y ) = $crop;
if ( 'left' === $x ) {
$s_x = 0;
} elseif ( 'right' === $x ) {
$s_x = $orig_w - $crop_w;
} else {
$s_x = floor( ( $orig_w - $crop_w ) / 2 );
}
if ( 'top' === $y ) {
$s_y = 0;
} elseif ( 'bottom' === $y ) {
$s_y = $orig_h - $crop_h;
} else {
$s_y = floor( ( $orig_h - $crop_h ) / 2 );
}
} else {
// don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
$crop_w = $orig_w;
$crop_h = $orig_h;
$s_x = 0;
$s_y = 0;
list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
}
// if the resulting image would be the same size or larger we don't want to resize it
if ( $new_w >= $orig_w && $new_h >= $orig_h && $dest_w != $orig_w && $dest_h != $orig_h ) {
return false;
}
// the return array matches the parameters to imagecopyresampled()
// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}
/**
* Resizes an image to make a thumbnail or intermediate size.
*
* The returned array has the file size, the image width, and image height. The
* {@see 'image_make_intermediate_size'} filter can be used to hook in and change the
* values of the returned array. The only parameter is the resized file path.
*
* @since 2.5.0
*
* @param string $file File path.
* @param int $width Image width.
* @param int $height Image height.
* @param bool $crop Optional. Whether to crop image to specified width and height or resize.
* Default false.
* @return false|array False, if no image was created. Metadata array on success.
*/
function image_make_intermediate_size( $file, $width, $height, $crop = false ) {
if ( $width || $height ) {
$editor = wp_get_image_editor( $file );
if ( is_wp_error( $editor ) || is_wp_error( $editor->resize( $width, $height, $crop ) ) ) {
return false;
}
$resized_file = $editor->save();
if ( ! is_wp_error( $resized_file ) && $resized_file ) {
unset( $resized_file['path'] );
return $resized_file;
}
}
return false;
}
/**
* Helper function to test if aspect ratios for two images match.
*
* @since 4.6.0
*
* @param int $source_width Width of the first image in pixels.
* @param int $source_height Height of the first image in pixels.
* @param int $target_width Width of the second image in pixels.
* @param int $target_height Height of the second image in pixels.
* @return bool True if aspect ratios match within 1px. False if not.
*/
function wp_image_matches_ratio( $source_width, $source_height, $target_width, $target_height ) {
/*
* To test for varying crops, we constrain the dimensions of the larger image
* to the dimensions of the smaller image and see if they match.
*/
if ( $source_width > $target_width ) {
$constrained_size = wp_constrain_dimensions( $source_width, $source_height, $target_width );
$expected_size = array( $target_width, $target_height );
} else {
$constrained_size = wp_constrain_dimensions( $target_width, $target_height, $source_width );
$expected_size = array( $source_width, $source_height );
}
// If the image dimensions are within 1px of the expected size, we consider it a match.
$matched = ( abs( $constrained_size[0] - $expected_size[0] ) <= 1 && abs( $constrained_size[1] - $expected_size[1] ) <= 1 );
return $matched;
}
/**
* Retrieves the image's intermediate size (resized) path, width, and height.
*
* The $size parameter can be an array with the width and height respectively.
* If the size matches the 'sizes' metadata array for width and height, then it
* will be used. If there is no direct match, then the nearest image size larger
* than the specified size will be used. If nothing is found, then the function
* will break out and return false.
*
* The metadata 'sizes' is used for compatible sizes that can be used for the
* parameter $size value.
*
* The url path will be given, when the $size parameter is a string.
*
* If you are passing an array for the $size, you should consider using
* add_image_size() so that a cropped version is generated. It's much more
* efficient than having to find the closest-sized image and then having the
* browser scale down the image.
*
* @since 2.5.0
*
* @param int $post_id Attachment ID.
* @param array|string $size Optional. Image size. Accepts any valid image size, or an array
* of width and height values in pixels (in that order).
* Default 'thumbnail'.
* @return false|array $data {
* Array of file relative path, width, and height on success. Additionally includes absolute
* path and URL if registered size is passed to $size parameter. False on failure.
*
* @type string $file Image's path relative to uploads directory
* @type int $width Width of image
* @type int $height Height of image
* @type string $path Image's absolute filesystem path.
* @type string $url Image's URL.
* }
*/
function image_get_intermediate_size( $post_id, $size = 'thumbnail' ) {
if ( ! $size || ! is_array( $imagedata = wp_get_attachment_metadata( $post_id ) ) || empty( $imagedata['sizes'] ) ) {
return false;
}
$data = array();
// Find the best match when '$size' is an array.
if ( is_array( $size ) ) {
$candidates = array();
if ( ! isset( $imagedata['file'] ) && isset( $imagedata['sizes']['full'] ) ) {
$imagedata['height'] = $imagedata['sizes']['full']['height'];
$imagedata['width'] = $imagedata['sizes']['full']['width'];
}
foreach ( $imagedata['sizes'] as $_size => $data ) {
// If there's an exact match to an existing image size, short circuit.
if ( $data['width'] == $size[0] && $data['height'] == $size[1] ) {
$candidates[ $data['width'] * $data['height'] ] = $data;
break;
}
// If it's not an exact match, consider larger sizes with the same aspect ratio.
if ( $data['width'] >= $size[0] && $data['height'] >= $size[1] ) {
// If '0' is passed to either size, we test ratios against the original file.
if ( 0 === $size[0] || 0 === $size[1] ) {
$same_ratio = wp_image_matches_ratio( $data['width'], $data['height'], $imagedata['width'], $imagedata['height'] );
} else {
$same_ratio = wp_image_matches_ratio( $data['width'], $data['height'], $size[0], $size[1] );
}
if ( $same_ratio ) {
$candidates[ $data['width'] * $data['height'] ] = $data;
}
}
}
if ( ! empty( $candidates ) ) {
// Sort the array by size if we have more than one candidate.
if ( 1 < count( $candidates ) ) {
ksort( $candidates );
}
$data = array_shift( $candidates );
/*
* When the size requested is smaller than the thumbnail dimensions, we
* fall back to the thumbnail size to maintain backwards compatibility with
* pre 4.6 versions of WordPress.
*/
} elseif ( ! empty( $imagedata['sizes']['thumbnail'] ) && $imagedata['sizes']['thumbnail']['width'] >= $size[0] && $imagedata['sizes']['thumbnail']['width'] >= $size[1] ) {
$data = $imagedata['sizes']['thumbnail'];
} else {
return false;
}
// Constrain the width and height attributes to the requested values.
list( $data['width'], $data['height'] ) = image_constrain_size_for_editor( $data['width'], $data['height'], $size );
} elseif ( ! empty( $imagedata['sizes'][ $size ] ) ) {
$data = $imagedata['sizes'][ $size ];
}
// If we still don't have a match at this point, return false.
if ( empty( $data ) ) {
return false;
}
// include the full filesystem path of the intermediate file
if ( empty( $data['path'] ) && ! empty( $data['file'] ) && ! empty( $imagedata['file'] ) ) {
$file_url = wp_get_attachment_url( $post_id );
$data['path'] = path_join( dirname( $imagedata['file'] ), $data['file'] );
$data['url'] = path_join( dirname( $file_url ), $data['file'] );
}
/**
* Filters the output of image_get_intermediate_size()
*
* @since 4.4.0
*
* @see image_get_intermediate_size()
*
* @param array $data Array of file relative path, width, and height on success. May also include
* file absolute path and URL.
* @param int $post_id The post_id of the image attachment
* @param string|array $size Registered image size or flat array of initially-requested height and width
* dimensions (in that order).
*/
return apply_filters( 'image_get_intermediate_size', $data, $post_id, $size );
}
/**
* Gets the available intermediate image sizes.
*
* @since 3.0.0
*
* @return array Returns a filtered array of image size strings.
*/
function get_intermediate_image_sizes() {
$_wp_additional_image_sizes = wp_get_additional_image_sizes();
$image_sizes = array( 'thumbnail', 'medium', 'medium_large', 'large' ); // Standard sizes
if ( ! empty( $_wp_additional_image_sizes ) ) {
$image_sizes = array_merge( $image_sizes, array_keys( $_wp_additional_image_sizes ) );
}
/**
* Filters the list of intermediate image sizes.
*
* @since 2.5.0
*
* @param array $image_sizes An array of intermediate image sizes. Defaults
* are 'thumbnail', 'medium', 'medium_large', 'large'.
*/
return apply_filters( 'intermediate_image_sizes', $image_sizes );
}
/**
* Retrieve an image to represent an attachment.
*
* A mime icon for files, thumbnail or intermediate size for images.
*
* The returned array contains four values: the URL of the attachment image src,
* the width of the image file, the height of the image file, and a boolean
* representing whether the returned array describes an intermediate (generated)
* image size or the original, full-sized upload.
*
* @since 2.5.0
*
* @param int $attachment_id Image attachment ID.
* @param string|array $size Optional. Image size. Accepts any valid image size, or an array of width
* and height values in pixels (in that order). Default 'thumbnail'.
* @param bool $icon Optional. Whether the image should be treated as an icon. Default false.
* @return false|array Returns an array (url, width, height, is_intermediate), or false, if no image is available.
*/
function wp_get_attachment_image_src( $attachment_id, $size = 'thumbnail', $icon = false ) {
// get a thumbnail or intermediate image if there is one
$image = image_downsize( $attachment_id, $size );
if ( ! $image ) {
$src = false;
if ( $icon && $src = wp_mime_type_icon( $attachment_id ) ) {
/** This filter is documented in wp-includes/post.php */
$icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' );
$src_file = $icon_dir . '/' . wp_basename( $src );
@list( $width, $height ) = getimagesize( $src_file );
}
if ( $src && $width && $height ) {
$image = array( $src, $width, $height );
}
}
/**
* Filters the image src result.
*
* @since 4.3.0
*
* @param array|false $image Either array with src, width & height, icon src, or false.
* @param int $attachment_id Image attachment ID.
* @param string|array $size Size of image. Image size or array of width and height values
* (in that order). Default 'thumbnail'.
* @param bool $icon Whether the image should be treated as an icon. Default false.
*/
return apply_filters( 'wp_get_attachment_image_src', $image, $attachment_id, $size, $icon );
}
/**
* Get an HTML img element representing an image attachment
*
* While `$size` will accept an array, it is better to register a size with
* add_image_size() so that a cropped version is generated. It's much more
* efficient than having to find the closest-sized image and then having the
* browser scale down the image.
*
* @since 2.5.0
*
* @param int $attachment_id Image attachment ID.
* @param string|array $size Optional. Image size. Accepts any valid image size, or an array of width
* and height values in pixels (in that order). Default 'thumbnail'.
* @param bool $icon Optional. Whether the image should be treated as an icon. Default false.
* @param string|array $attr Optional. Attributes for the image markup. Default empty.
* @return string HTML img element or empty string on failure.
*/
function wp_get_attachment_image( $attachment_id, $size = 'thumbnail', $icon = false, $attr = '' ) {
$html = '';
$image = wp_get_attachment_image_src( $attachment_id, $size, $icon );
if ( $image ) {
list($src, $width, $height) = $image;
$hwstring = image_hwstring( $width, $height );
$size_class = $size;
if ( is_array( $size_class ) ) {
$size_class = join( 'x', $size_class );
}
$attachment = get_post( $attachment_id );
$default_attr = array(
'src' => $src,
'class' => "attachment-$size_class size-$size_class",
'alt' => trim( strip_tags( get_post_meta( $attachment_id, '_wp_attachment_image_alt', true ) ) ),
);
$attr = wp_parse_args( $attr, $default_attr );
// Generate 'srcset' and 'sizes' if not already present.
if ( empty( $attr['srcset'] ) ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
if ( is_array( $image_meta ) ) {
$size_array = array( absint( $width ), absint( $height ) );
$srcset = wp_calculate_image_srcset( $size_array, $src, $image_meta, $attachment_id );
$sizes = wp_calculate_image_sizes( $size_array, $src, $image_meta, $attachment_id );
if ( $srcset && ( $sizes || ! empty( $attr['sizes'] ) ) ) {
$attr['srcset'] = $srcset;
if ( empty( $attr['sizes'] ) ) {
$attr['sizes'] = $sizes;
}
}
}
}
/**
* Filters the list of attachment image attributes.
*
* @since 2.8.0
*
* @param array $attr Attributes for the image markup.
* @param WP_Post $attachment Image attachment post.
* @param string|array $size Requested size. Image size or array of width and height values
* (in that order). Default 'thumbnail'.
*/
$attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment, $size );
$attr = array_map( 'esc_attr', $attr );
$html = rtrim( "<img $hwstring" );
foreach ( $attr as $name => $value ) {
$html .= " $name=" . '"' . $value . '"';
}
$html .= ' />';
}
return $html;
}
/**
* Get the URL of an image attachment.
*
* @since 4.4.0
*
* @param int $attachment_id Image attachment ID.
* @param string|array $size Optional. Image size to retrieve. Accepts any valid image size, or an array
* of width and height values in pixels (in that order). Default 'thumbnail'.
* @param bool $icon Optional. Whether the image should be treated as an icon. Default false.
* @return string|false Attachment URL or false if no image is available.
*/
function wp_get_attachment_image_url( $attachment_id, $size = 'thumbnail', $icon = false ) {
$image = wp_get_attachment_image_src( $attachment_id, $size, $icon );
return isset( $image['0'] ) ? $image['0'] : false;
}
/**
* Get the attachment path relative to the upload directory.
*
* @since 4.4.1
* @access private
*
* @param string $file Attachment file name.
* @return string Attachment path relative to the upload directory.
*/
function _wp_get_attachment_relative_path( $file ) {
$dirname = dirname( $file );
if ( '.' === $dirname ) {
return '';
}
if ( false !== strpos( $dirname, 'wp-content/uploads' ) ) {
// Get the directory name relative to the upload directory (back compat for pre-2.7 uploads)
$dirname = substr( $dirname, strpos( $dirname, 'wp-content/uploads' ) + 18 );
$dirname = ltrim( $dirname, '/' );
}
return $dirname;
}
/**
* Get the image size as array from its meta data.
*
* Used for responsive images.
*
* @since 4.4.0
* @access private
*
* @param string $size_name Image size. Accepts any valid image size name ('thumbnail', 'medium', etc.).
* @param array $image_meta The image meta data.
* @return array|bool Array of width and height values in pixels (in that order)
* or false if the size doesn't exist.
*/
function _wp_get_image_size_from_meta( $size_name, $image_meta ) {
if ( $size_name === 'full' ) {
return array(
absint( $image_meta['width'] ),
absint( $image_meta['height'] ),
);
} elseif ( ! empty( $image_meta['sizes'][ $size_name ] ) ) {
return array(
absint( $image_meta['sizes'][ $size_name ]['width'] ),
absint( $image_meta['sizes'][ $size_name ]['height'] ),
);
}
return false;
}
/**
* Retrieves the value for an image attachment's 'srcset' attribute.
*
* @since 4.4.0
*
* @see wp_calculate_image_srcset()
*
* @param int $attachment_id Image attachment ID.
* @param array|string $size Optional. Image size. Accepts any valid image size, or an array of
* width and height values in pixels (in that order). Default 'medium'.
* @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'.
* Default null.
* @return string|bool A 'srcset' value string or false.
*/
function wp_get_attachment_image_srcset( $attachment_id, $size = 'medium', $image_meta = null ) {
if ( ! $image = wp_get_attachment_image_src( $attachment_id, $size ) ) {
return false;
}
if ( ! is_array( $image_meta ) ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
}
$image_src = $image[0];
$size_array = array(
absint( $image[1] ),
absint( $image[2] ),
);
return wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id );
}
/**
* A helper function to calculate the image sources to include in a 'srcset' attribute.
*
* @since 4.4.0
*
* @param array $size_array Array of width and height values in pixels (in that order).
* @param string $image_src The 'src' of the image.
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param int $attachment_id Optional. The image attachment ID to pass to the filter. Default 0.
* @return string|bool The 'srcset' attribute value. False on error or when only one source exists.
*/
function wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id = 0 ) {
/**
* Let plugins pre-filter the image meta to be able to fix inconsistencies in the stored data.
*
* @since 4.5.0
*
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param array $size_array Array of width and height values in pixels (in that order).
* @param string $image_src The 'src' of the image.
* @param int $attachment_id The image attachment ID or 0 if not supplied.
*/
$image_meta = apply_filters( 'wp_calculate_image_srcset_meta', $image_meta, $size_array, $image_src, $attachment_id );
if ( empty( $image_meta['sizes'] ) || ! isset( $image_meta['file'] ) || strlen( $image_meta['file'] ) < 4 ) {
return false;
}
$image_sizes = $image_meta['sizes'];
// Get the width and height of the image.
$image_width = (int) $size_array[0];
$image_height = (int) $size_array[1];
// Bail early if error/no width.
if ( $image_width < 1 ) {
return false;
}
$image_basename = wp_basename( $image_meta['file'] );
/*
* WordPress flattens animated GIFs into one frame when generating intermediate sizes.
* To avoid hiding animation in user content, if src is a full size GIF, a srcset attribute is not generated.
* If src is an intermediate size GIF, the full size is excluded from srcset to keep a flattened GIF from becoming animated.
*/
if ( ! isset( $image_sizes['thumbnail']['mime-type'] ) || 'image/gif' !== $image_sizes['thumbnail']['mime-type'] ) {
$image_sizes[] = array(
'width' => $image_meta['width'],
'height' => $image_meta['height'],
'file' => $image_basename,
);
} elseif ( strpos( $image_src, $image_meta['file'] ) ) {
return false;
}
// Retrieve the uploads sub-directory from the full size image.
$dirname = _wp_get_attachment_relative_path( $image_meta['file'] );
if ( $dirname ) {
$dirname = trailingslashit( $dirname );
}
$upload_dir = wp_get_upload_dir();
$image_baseurl = trailingslashit( $upload_dir['baseurl'] ) . $dirname;
/*
* If currently on HTTPS, prefer HTTPS URLs when we know they're supported by the domain
* (which is to say, when they share the domain name of the current request).
*/
if ( is_ssl() && 'https' !== substr( $image_baseurl, 0, 5 ) && parse_url( $image_baseurl, PHP_URL_HOST ) === $_SERVER['HTTP_HOST'] ) {
$image_baseurl = set_url_scheme( $image_baseurl, 'https' );
}
/*
* Images that have been edited in WordPress after being uploaded will
* contain a unique hash. Look for that hash and use it later to filter
* out images that are leftovers from previous versions.
*/
$image_edited = preg_match( '/-e[0-9]{13}/', wp_basename( $image_src ), $image_edit_hash );
/**
* Filters the maximum image width to be included in a 'srcset' attribute.
*
* @since 4.4.0
*
* @param int $max_width The maximum image width to be included in the 'srcset'. Default '1600'.
* @param array $size_array Array of width and height values in pixels (in that order).
*/
$max_srcset_image_width = apply_filters( 'max_srcset_image_width', 1600, $size_array );
// Array to hold URL candidates.
$sources = array();
/**
* To make sure the ID matches our image src, we will check to see if any sizes in our attachment
* meta match our $image_src. If no matches are found we don't return a srcset to avoid serving
* an incorrect image. See #35045.
*/
$src_matched = false;
/*
* Loop through available images. Only use images that are resized
* versions of the same edit.
*/
foreach ( $image_sizes as $image ) {
$is_src = false;
// Check if image meta isn't corrupted.
if ( ! is_array( $image ) ) {
continue;
}
// If the file name is part of the `src`, we've confirmed a match.
if ( ! $src_matched && false !== strpos( $image_src, $dirname . $image['file'] ) ) {
$src_matched = $is_src = true;
}
// Filter out images that are from previous edits.
if ( $image_edited && ! strpos( $image['file'], $image_edit_hash[0] ) ) {
continue;
}
/*
* Filters out images that are wider than '$max_srcset_image_width' unless
* that file is in the 'src' attribute.
*/
if ( $max_srcset_image_width && $image['width'] > $max_srcset_image_width && ! $is_src ) {
continue;
}
// If the image dimensions are within 1px of the expected size, use it.
if ( wp_image_matches_ratio( $image_width, $image_height, $image['width'], $image['height'] ) ) {
// Add the URL, descriptor, and value to the sources array to be returned.
$source = array(
'url' => $image_baseurl . $image['file'],
'descriptor' => 'w',
'value' => $image['width'],
);
// The 'src' image has to be the first in the 'srcset', because of a bug in iOS8. See #35030.
if ( $is_src ) {
$sources = array( $image['width'] => $source ) + $sources;
} else {
$sources[ $image['width'] ] = $source;
}
}
}
/**
* Filters an image's 'srcset' sources.
*
* @since 4.4.0
*
* @param array $sources {
* One or more arrays of source data to include in the 'srcset'.
*
* @type array $width {
* @type string $url The URL of an image source.
* @type string $descriptor The descriptor type used in the image candidate string,
* either 'w' or 'x'.
* @type int $value The source width if paired with a 'w' descriptor, or a
* pixel density value if paired with an 'x' descriptor.
* }
* }
* @param array $size_array Array of width and height values in pixels (in that order).
* @param string $image_src The 'src' of the image.
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param int $attachment_id Image attachment ID or 0.
*/
$sources = apply_filters( 'wp_calculate_image_srcset', $sources, $size_array, $image_src, $image_meta, $attachment_id );
// Only return a 'srcset' value if there is more than one source.
if ( ! $src_matched || ! is_array( $sources ) || count( $sources ) < 2 ) {
return false;
}
$srcset = '';
foreach ( $sources as $source ) {
$srcset .= str_replace( ' ', '%20', $source['url'] ) . ' ' . $source['value'] . $source['descriptor'] . ', ';
}
return rtrim( $srcset, ', ' );
}
/**
* Retrieves the value for an image attachment's 'sizes' attribute.
*
* @since 4.4.0
*
* @see wp_calculate_image_sizes()
*
* @param int $attachment_id Image attachment ID.
* @param array|string $size Optional. Image size. Accepts any valid image size, or an array of width
* and height values in pixels (in that order). Default 'medium'.
* @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'.
* Default null.
* @return string|bool A valid source size value for use in a 'sizes' attribute or false.
*/
function wp_get_attachment_image_sizes( $attachment_id, $size = 'medium', $image_meta = null ) {
if ( ! $image = wp_get_attachment_image_src( $attachment_id, $size ) ) {
return false;
}
if ( ! is_array( $image_meta ) ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
}
$image_src = $image[0];
$size_array = array(
absint( $image[1] ),
absint( $image[2] ),
);
return wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id );
}
/**
* Creates a 'sizes' attribute value for an image.
*
* @since 4.4.0
*
* @param array|string $size Image size to retrieve. Accepts any valid image size, or an array
* of width and height values in pixels (in that order). Default 'medium'.
* @param string $image_src Optional. The URL to the image file. Default null.
* @param array $image_meta Optional. The image meta data as returned by 'wp_get_attachment_metadata()'.
* Default null.
* @param int $attachment_id Optional. Image attachment ID. Either `$image_meta` or `$attachment_id`
* is needed when using the image size name as argument for `$size`. Default 0.
* @return string|bool A valid source size value for use in a 'sizes' attribute or false.
*/
function wp_calculate_image_sizes( $size, $image_src = null, $image_meta = null, $attachment_id = 0 ) {
$width = 0;
if ( is_array( $size ) ) {
$width = absint( $size[0] );
} elseif ( is_string( $size ) ) {
if ( ! $image_meta && $attachment_id ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
}
if ( is_array( $image_meta ) ) {
$size_array = _wp_get_image_size_from_meta( $size, $image_meta );
if ( $size_array ) {
$width = absint( $size_array[0] );
}
}
}
if ( ! $width ) {
return false;
}
// Setup the default 'sizes' attribute.
$sizes = sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $width );
/**
* Filters the output of 'wp_calculate_image_sizes()'.
*
* @since 4.4.0
*
* @param string $sizes A source size value for use in a 'sizes' attribute.
* @param array|string $size Requested size. Image size or array of width and height values
* in pixels (in that order).
* @param string|null $image_src The URL to the image file or null.
* @param array|null $image_meta The image meta data as returned by wp_get_attachment_metadata() or null.
* @param int $attachment_id Image attachment ID of the original image or 0.
*/
return apply_filters( 'wp_calculate_image_sizes', $sizes, $size, $image_src, $image_meta, $attachment_id );
}
/**
* Filters 'img' elements in post content to add 'srcset' and 'sizes' attributes.
*
* @since 4.4.0
*
* @see wp_image_add_srcset_and_sizes()
*
* @param string $content The raw post content to be filtered.
* @return string Converted content with 'srcset' and 'sizes' attributes added to images.
*/
function wp_make_content_images_responsive( $content ) {
if ( ! preg_match_all( '/<img [^>]+>/', $content, $matches ) ) {
return $content;
}
$selected_images = $attachment_ids = array();
foreach ( $matches[0] as $image ) {
if ( false === strpos( $image, ' srcset=' ) && preg_match( '/wp-image-([0-9]+)/i', $image, $class_id ) &&
( $attachment_id = absint( $class_id[1] ) ) ) {
/*
* If exactly the same image tag is used more than once, overwrite it.
* All identical tags will be replaced later with 'str_replace()'.
*/
$selected_images[ $image ] = $attachment_id;
// Overwrite the ID when the same image is included more than once.
$attachment_ids[ $attachment_id ] = true;
}
}
if ( count( $attachment_ids ) > 1 ) {
/*
* Warm the object cache with post and meta information for all found
* images to avoid making individual database calls.
*/
_prime_post_caches( array_keys( $attachment_ids ), false, true );
}
foreach ( $selected_images as $image => $attachment_id ) {
$image_meta = wp_get_attachment_metadata( $attachment_id );
$content = str_replace( $image, wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id ), $content );
}
return $content;
}
/**
* Adds 'srcset' and 'sizes' attributes to an existing 'img' element.
*
* @since 4.4.0
*
* @see wp_calculate_image_srcset()
* @see wp_calculate_image_sizes()
*
* @param string $image An HTML 'img' element to be filtered.
* @param array $image_meta The image meta data as returned by 'wp_get_attachment_metadata()'.
* @param int $attachment_id Image attachment ID.
* @return string Converted 'img' element with 'srcset' and 'sizes' attributes added.
*/
function wp_image_add_srcset_and_sizes( $image, $image_meta, $attachment_id ) {
// Ensure the image meta exists.
if ( empty( $image_meta['sizes'] ) ) {
return $image;
}
$image_src = preg_match( '/src="([^"]+)"/', $image, $match_src ) ? $match_src[1] : '';
list( $image_src ) = explode( '?', $image_src );
// Return early if we couldn't get the image source.
if ( ! $image_src ) {
return $image;
}
// Bail early if an image has been inserted and later edited.
if ( preg_match( '/-e[0-9]{13}/', $image_meta['file'], $img_edit_hash ) &&
strpos( wp_basename( $image_src ), $img_edit_hash[0] ) === false ) {
return $image;
}
$width = preg_match( '/ width="([0-9]+)"/', $image, $match_width ) ? (int) $match_width[1] : 0;
$height = preg_match( '/ height="([0-9]+)"/', $image, $match_height ) ? (int) $match_height[1] : 0;
if ( ! $width || ! $height ) {
/*
* If attempts to parse the size value failed, attempt to use the image meta data to match
* the image file name from 'src' against the available sizes for an attachment.
*/
$image_filename = wp_basename( $image_src );
if ( $image_filename === wp_basename( $image_meta['file'] ) ) {
$width = (int) $image_meta['width'];
$height = (int) $image_meta['height'];
} else {
foreach ( $image_meta['sizes'] as $image_size_data ) {
if ( $image_filename === $image_size_data['file'] ) {
$width = (int) $image_size_data['width'];
$height = (int) $image_size_data['height'];
break;
}
}
}
}
if ( ! $width || ! $height ) {
return $image;
}
$size_array = array( $width, $height );
$srcset = wp_calculate_image_srcset( $size_array, $image_src, $image_meta, $attachment_id );
if ( $srcset ) {
// Check if there is already a 'sizes' attribute.
$sizes = strpos( $image, ' sizes=' );
if ( ! $sizes ) {
$sizes = wp_calculate_image_sizes( $size_array, $image_src, $image_meta, $attachment_id );
}
}
if ( $srcset && $sizes ) {
// Format the 'srcset' and 'sizes' string and escape attributes.
$attr = sprintf( ' srcset="%s"', esc_attr( $srcset ) );
if ( is_string( $sizes ) ) {
$attr .= sprintf( ' sizes="%s"', esc_attr( $sizes ) );
}
// Add 'srcset' and 'sizes' attributes to the image markup.
$image = preg_replace( '/<img ([^>]+?)[\/ ]*>/', '<img $1' . $attr . ' />', $image );
}
return $image;
}
/**
* Adds a 'wp-post-image' class to post thumbnails. Internal use only.
*
* Uses the {@see 'begin_fetch_post_thumbnail_html'} and {@see 'end_fetch_post_thumbnail_html'}
* action hooks to dynamically add/remove itself so as to only filter post thumbnails.
*
* @ignore
* @since 2.9.0
*
* @param array $attr Thumbnail attributes including src, class, alt, title.
* @return array Modified array of attributes including the new 'wp-post-image' class.
*/
function _wp_post_thumbnail_class_filter( $attr ) {
$attr['class'] .= ' wp-post-image';
return $attr;
}
/**
* Adds '_wp_post_thumbnail_class_filter' callback to the 'wp_get_attachment_image_attributes'
* filter hook. Internal use only.
*
* @ignore
* @since 2.9.0
*
* @param array $attr Thumbnail attributes including src, class, alt, title.
*/
function _wp_post_thumbnail_class_filter_add( $attr ) {
add_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
}
/**
* Removes the '_wp_post_thumbnail_class_filter' callback from the 'wp_get_attachment_image_attributes'
* filter hook. Internal use only.
*
* @ignore
* @since 2.9.0
*
* @param array $attr Thumbnail attributes including src, class, alt, title.
*/
function _wp_post_thumbnail_class_filter_remove( $attr ) {
remove_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
}
add_shortcode( 'wp_caption', 'img_caption_shortcode' );
add_shortcode( 'caption', 'img_caption_shortcode' );
/**
* Builds the Caption shortcode output.
*
* Allows a plugin to replace the content that would otherwise be returned. The
* filter is {@see 'img_caption_shortcode'} and passes an empty string, the attr
* parameter and the content parameter values.
*
* The supported attributes for the shortcode are 'id', 'caption_id', 'align',
* 'width', 'caption', and 'class'.
*
* @since 2.6.0
* @since 3.9.0 The `class` attribute was added.
* @since 5.0.0 The `caption_id` attribute was added.
*
* @param array $attr {
* Attributes of the caption shortcode.
*
* @type string $id ID of the image and caption container element, i.e. `<figure>` or `<div>`.
* @type string $caption_id ID of the caption element, i.e. `<figcaption>` or `<p>`.
* @type string $align Class name that aligns the caption. Default 'alignnone'. Accepts 'alignleft',
* 'aligncenter', alignright', 'alignnone'.
* @type int $width The width of the caption, in pixels.
* @type string $caption The caption text.
* @type string $class Additional class name(s) added to the caption container.
* }
* @param string $content Shortcode content.
* @return string HTML content to display the caption.
*/
function img_caption_shortcode( $attr, $content = null ) {
// New-style shortcode with the caption inside the shortcode with the link and image tags.
if ( ! isset( $attr['caption'] ) ) {
if ( preg_match( '#((?:<a [^>]+>\s*)?<img [^>]+>(?:\s*</a>)?)(.*)#is', $content, $matches ) ) {
$content = $matches[1];
$attr['caption'] = trim( $matches[2] );
}
} elseif ( strpos( $attr['caption'], '<' ) !== false ) {
$attr['caption'] = wp_kses( $attr['caption'], 'post' );
}
/**
* Filters the default caption shortcode output.
*
* If the filtered output isn't empty, it will be used instead of generating
* the default caption template.
*
* @since 2.6.0
*
* @see img_caption_shortcode()
*
* @param string $output The caption output. Default empty.
* @param array $attr Attributes of the caption shortcode.
* @param string $content The image element, possibly wrapped in a hyperlink.
*/
$output = apply_filters( 'img_caption_shortcode', '', $attr, $content );
if ( $output != '' ) {
return $output;
}
$atts = shortcode_atts(
array(
'id' => '',
'caption_id' => '',
'align' => 'alignnone',
'width' => '',
'caption' => '',
'class' => '',
),
$attr,
'caption'
);
$atts['width'] = (int) $atts['width'];
if ( $atts['width'] < 1 || empty( $atts['caption'] ) ) {
return $content;
}
$id = $caption_id = $describedby = '';
if ( $atts['id'] ) {
$atts['id'] = sanitize_html_class( $atts['id'] );
$id = 'id="' . esc_attr( $atts['id'] ) . '" ';
}
if ( $atts['caption_id'] ) {
$atts['caption_id'] = sanitize_html_class( $atts['caption_id'] );
} elseif ( $atts['id'] ) {
$atts['caption_id'] = 'caption-' . str_replace( '_', '-', $atts['id'] );
}
if ( $atts['caption_id'] ) {
$caption_id = 'id="' . esc_attr( $atts['caption_id'] ) . '" ';
$describedby = 'aria-describedby="' . esc_attr( $atts['caption_id'] ) . '" ';
}
$class = trim( 'wp-caption ' . $atts['align'] . ' ' . $atts['class'] );
$html5 = current_theme_supports( 'html5', 'caption' );
// HTML5 captions never added the extra 10px to the image width
$width = $html5 ? $atts['width'] : ( 10 + $atts['width'] );
/**
* Filters the width of an image's caption.
*
* By default, the caption is 10 pixels greater than the width of the image,
* to prevent post content from running up against a floated image.
*
* @since 3.7.0
*
* @see img_caption_shortcode()
*
* @param int $width Width of the caption in pixels. To remove this inline style,
* return zero.
* @param array $atts Attributes of the caption shortcode.
* @param string $content The image element, possibly wrapped in a hyperlink.
*/
$caption_width = apply_filters( 'img_caption_shortcode_width', $width, $atts, $content );
$style = '';
if ( $caption_width ) {
$style = 'style="width: ' . (int) $caption_width . 'px" ';
}
if ( $html5 ) {
$html = sprintf(
'<figure %s%s%sclass="%s">%s%s</figure>',
$id,
$describedby,
$style,
esc_attr( $class ),
do_shortcode( $content ),
sprintf(
'<figcaption %sclass="wp-caption-text">%s</figcaption>',
$caption_id,
$atts['caption']
)
);
} else {
$html = sprintf(
'<div %s%sclass="%s">%s%s</div>',
$id,
$style,
esc_attr( $class ),
str_replace( '<img ', '<img ' . $describedby, do_shortcode( $content ) ),
sprintf(
'<p %sclass="wp-caption-text">%s</p>',
$caption_id,
$atts['caption']
)
);
}
return $html;
}
add_shortcode( 'gallery', 'gallery_shortcode' );
/**
* Builds the Gallery shortcode output.
*
* This implements the functionality of the Gallery Shortcode for displaying
* WordPress images on a post.
*
* @since 2.5.0
*
* @staticvar int $instance
*
* @param array $attr {
* Attributes of the gallery shortcode.
*
* @type string $order Order of the images in the gallery. Default 'ASC'. Accepts 'ASC', 'DESC'.
* @type string $orderby The field to use when ordering the images. Default 'menu_order ID'.
* Accepts any valid SQL ORDERBY statement.
* @type int $id Post ID.
* @type string $itemtag HTML tag to use for each image in the gallery.
* Default 'dl', or 'figure' when the theme registers HTML5 gallery support.
* @type string $icontag HTML tag to use for each image's icon.
* Default 'dt', or 'div' when the theme registers HTML5 gallery support.
* @type string $captiontag HTML tag to use for each image's caption.
* Default 'dd', or 'figcaption' when the theme registers HTML5 gallery support.
* @type int $columns Number of columns of images to display. Default 3.
* @type string|array $size Size of the images to display. Accepts any valid image size, or an array of width
* and height values in pixels (in that order). Default 'thumbnail'.
* @type string $ids A comma-separated list of IDs of attachments to display. Default empty.
* @type string $include A comma-separated list of IDs of attachments to include. Default empty.
* @type string $exclude A comma-separated list of IDs of attachments to exclude. Default empty.
* @type string $link What to link each image to. Default empty (links to the attachment page).
* Accepts 'file', 'none'.
* }
* @return string HTML content to display gallery.
*/
function gallery_shortcode( $attr ) {
$post = get_post();
static $instance = 0;
$instance++;
if ( ! empty( $attr['ids'] ) ) {
// 'ids' is explicitly ordered, unless you specify otherwise.
if ( empty( $attr['orderby'] ) ) {
$attr['orderby'] = 'post__in';
}
$attr['include'] = $attr['ids'];
}
/**
* Filters the default gallery shortcode output.
*
* If the filtered output isn't empty, it will be used instead of generating
* the default gallery template.
*
* @since 2.5.0
* @since 4.2.0 The `$instance` parameter was added.
*
* @see gallery_shortcode()
*
* @param string $output The gallery output. Default empty.
* @param array $attr Attributes of the gallery shortcode.
* @param int $instance Unique numeric ID of this gallery shortcode instance.
*/
$output = apply_filters( 'post_gallery', '', $attr, $instance );
if ( $output != '' ) {
return $output;
}
$html5 = current_theme_supports( 'html5', 'gallery' );
$atts = shortcode_atts(
array(
'order' => 'ASC',
'orderby' => 'menu_order ID',
'id' => $post ? $post->ID : 0,
'itemtag' => $html5 ? 'figure' : 'dl',
'icontag' => $html5 ? 'div' : 'dt',
'captiontag' => $html5 ? 'figcaption' : 'dd',
'columns' => 3,
'size' => 'thumbnail',
'include' => '',
'exclude' => '',
'link' => '',
),
$attr,
'gallery'
);
$id = intval( $atts['id'] );
if ( ! empty( $atts['include'] ) ) {
$_attachments = get_posts(
array(
'include' => $atts['include'],
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => $atts['order'],
'orderby' => $atts['orderby'],
)
);
$attachments = array();
foreach ( $_attachments as $key => $val ) {
$attachments[ $val->ID ] = $_attachments[ $key ];
}
} elseif ( ! empty( $atts['exclude'] ) ) {
$attachments = get_children(
array(
'post_parent' => $id,
'exclude' => $atts['exclude'],
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => $atts['order'],
'orderby' => $atts['orderby'],
)
);
} else {
$attachments = get_children(
array(
'post_parent' => $id,
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => $atts['order'],
'orderby' => $atts['orderby'],
)
);
}
if ( empty( $attachments ) ) {
return '';
}
if ( is_feed() ) {
$output = "\n";
foreach ( $attachments as $att_id => $attachment ) {
$output .= wp_get_attachment_link( $att_id, $atts['size'], true ) . "\n";
}
return $output;
}
$itemtag = tag_escape( $atts['itemtag'] );
$captiontag = tag_escape( $atts['captiontag'] );
$icontag = tag_escape( $atts['icontag'] );
$valid_tags = wp_kses_allowed_html( 'post' );
if ( ! isset( $valid_tags[ $itemtag ] ) ) {
$itemtag = 'dl';
}
if ( ! isset( $valid_tags[ $captiontag ] ) ) {
$captiontag = 'dd';
}
if ( ! isset( $valid_tags[ $icontag ] ) ) {
$icontag = 'dt';
}
$columns = intval( $atts['columns'] );
$itemwidth = $columns > 0 ? floor( 100 / $columns ) : 100;
$float = is_rtl() ? 'right' : 'left';
$selector = "gallery-{$instance}";
$gallery_style = '';
/**
* Filters whether to print default gallery styles.
*
* @since 3.1.0
*
* @param bool $print Whether to print default gallery styles.
* Defaults to false if the theme supports HTML5 galleries.
* Otherwise, defaults to true.
*/
if ( apply_filters( 'use_default_gallery_style', ! $html5 ) ) {
$gallery_style = "
<style type='text/css'>
#{$selector} {
margin: auto;
}
#{$selector} .gallery-item {
float: {$float};
margin-top: 10px;
text-align: center;
width: {$itemwidth}%;
}
#{$selector} img {
border: 2px solid #cfcfcf;
}
#{$selector} .gallery-caption {
margin-left: 0;
}
/* see gallery_shortcode() in wp-includes/media.php */
</style>\n\t\t";
}
$size_class = sanitize_html_class( $atts['size'] );
$gallery_div = "<div id='$selector' class='gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class}'>";
/**
* Filters the default gallery shortcode CSS styles.
*
* @since 2.5.0
*
* @param string $gallery_style Default CSS styles and opening HTML div container
* for the gallery shortcode output.
*/
$output = apply_filters( 'gallery_style', $gallery_style . $gallery_div );
$i = 0;
foreach ( $attachments as $id => $attachment ) {
$attr = ( trim( $attachment->post_excerpt ) ) ? array( 'aria-describedby' => "$selector-$id" ) : '';
if ( ! empty( $atts['link'] ) && 'file' === $atts['link'] ) {
$image_output = wp_get_attachment_link( $id, $atts['size'], false, false, false, $attr );
} elseif ( ! empty( $atts['link'] ) && 'none' === $atts['link'] ) {
$image_output = wp_get_attachment_image( $id, $atts['size'], false, $attr );
} else {
$image_output = wp_get_attachment_link( $id, $atts['size'], true, false, false, $attr );
}
$image_meta = wp_get_attachment_metadata( $id );
$orientation = '';
if ( isset( $image_meta['height'], $image_meta['width'] ) ) {
$orientation = ( $image_meta['height'] > $image_meta['width'] ) ? 'portrait' : 'landscape';
}
$output .= "<{$itemtag} class='gallery-item'>";
$output .= "
<{$icontag} class='gallery-icon {$orientation}'>
$image_output
</{$icontag}>";
if ( $captiontag && trim( $attachment->post_excerpt ) ) {
$output .= "
<{$captiontag} class='wp-caption-text gallery-caption' id='$selector-$id'>
" . wptexturize( $attachment->post_excerpt ) . "
</{$captiontag}>";
}
$output .= "</{$itemtag}>";
if ( ! $html5 && $columns > 0 && ++$i % $columns == 0 ) {
$output .= '<br style="clear: both" />';
}
}
if ( ! $html5 && $columns > 0 && $i % $columns !== 0 ) {
$output .= "
<br style='clear: both' />";
}
$output .= "
</div>\n";
return $output;
}
/**
* Outputs the templates used by playlists.
*
* @since 3.9.0
*/
function wp_underscore_playlist_templates() {
?>
<script type="text/html" id="tmpl-wp-playlist-current-item">
<# if ( data.image ) { #>
<img src="{{ data.thumb.src }}" alt="" />
<# } #>
<div class="wp-playlist-caption">
<span class="wp-playlist-item-meta wp-playlist-item-title">
<?php
/* translators: playlist item title */
printf( _x( '&#8220;%s&#8221;', 'playlist item title' ), '{{ data.title }}' );
?>
</span>
<# if ( data.meta.album ) { #><span class="wp-playlist-item-meta wp-playlist-item-album">{{ data.meta.album }}</span><# } #>
<# if ( data.meta.artist ) { #><span class="wp-playlist-item-meta wp-playlist-item-artist">{{ data.meta.artist }}</span><# } #>
</div>
</script>
<script type="text/html" id="tmpl-wp-playlist-item">
<div class="wp-playlist-item">
<a class="wp-playlist-caption" href="{{ data.src }}">
{{ data.index ? ( data.index + '. ' ) : '' }}
<# if ( data.caption ) { #>
{{ data.caption }}
<# } else { #>
<span class="wp-playlist-item-title">
<?php
/* translators: playlist item title */
printf( _x( '&#8220;%s&#8221;', 'playlist item title' ), '{{{ data.title }}}' );
?>
</span>
<# if ( data.artists && data.meta.artist ) { #>
<span class="wp-playlist-item-artist"> &mdash; {{ data.meta.artist }}</span>
<# } #>
<# } #>
</a>
<# if ( data.meta.length_formatted ) { #>
<div class="wp-playlist-item-length">{{ data.meta.length_formatted }}</div>
<# } #>
</div>
</script>
<?php
}
/**
* Outputs and enqueue default scripts and styles for playlists.
*
* @since 3.9.0
*
* @param string $type Type of playlist. Accepts 'audio' or 'video'.
*/
function wp_playlist_scripts( $type ) {
wp_enqueue_style( 'wp-mediaelement' );
wp_enqueue_script( 'wp-playlist' );
?>
<!--[if lt IE 9]><script>document.createElement('<?php echo esc_js( $type ); ?>');</script><![endif]-->
<?php
add_action( 'wp_footer', 'wp_underscore_playlist_templates', 0 );
add_action( 'admin_footer', 'wp_underscore_playlist_templates', 0 );
}
/**
* Builds the Playlist shortcode output.
*
* This implements the functionality of the playlist shortcode for displaying
* a collection of WordPress audio or video files in a post.
*
* @since 3.9.0
*
* @global int $content_width
* @staticvar int $instance
*
* @param array $attr {
* Array of default playlist attributes.
*
* @type string $type Type of playlist to display. Accepts 'audio' or 'video'. Default 'audio'.
* @type string $order Designates ascending or descending order of items in the playlist.
* Accepts 'ASC', 'DESC'. Default 'ASC'.
* @type string $orderby Any column, or columns, to sort the playlist. If $ids are
* passed, this defaults to the order of the $ids array ('post__in').
* Otherwise default is 'menu_order ID'.
* @type int $id If an explicit $ids array is not present, this parameter
* will determine which attachments are used for the playlist.
* Default is the current post ID.
* @type array $ids Create a playlist out of these explicit attachment IDs. If empty,
* a playlist will be created from all $type attachments of $id.
* Default empty.
* @type array $exclude List of specific attachment IDs to exclude from the playlist. Default empty.
* @type string $style Playlist style to use. Accepts 'light' or 'dark'. Default 'light'.
* @type bool $tracklist Whether to show or hide the playlist. Default true.
* @type bool $tracknumbers Whether to show or hide the numbers next to entries in the playlist. Default true.
* @type bool $images Show or hide the video or audio thumbnail (Featured Image/post
* thumbnail). Default true.
* @type bool $artists Whether to show or hide artist name in the playlist. Default true.
* }
*
* @return string Playlist output. Empty string if the passed type is unsupported.
*/
function wp_playlist_shortcode( $attr ) {
global $content_width;
$post = get_post();
static $instance = 0;
$instance++;
if ( ! empty( $attr['ids'] ) ) {
// 'ids' is explicitly ordered, unless you specify otherwise.
if ( empty( $attr['orderby'] ) ) {
$attr['orderby'] = 'post__in';
}
$attr['include'] = $attr['ids'];
}
/**
* Filters the playlist output.
*
* Passing a non-empty value to the filter will short-circuit generation
* of the default playlist output, returning the passed value instead.
*
* @since 3.9.0
* @since 4.2.0 The `$instance` parameter was added.
*
* @param string $output Playlist output. Default empty.
* @param array $attr An array of shortcode attributes.
* @param int $instance Unique numeric ID of this playlist shortcode instance.
*/
$output = apply_filters( 'post_playlist', '', $attr, $instance );
if ( $output != '' ) {
return $output;
}
$atts = shortcode_atts(
array(
'type' => 'audio',
'order' => 'ASC',
'orderby' => 'menu_order ID',
'id' => $post ? $post->ID : 0,
'include' => '',
'exclude' => '',
'style' => 'light',
'tracklist' => true,
'tracknumbers' => true,
'images' => true,
'artists' => true,
),
$attr,
'playlist'
);
$id = intval( $atts['id'] );
if ( $atts['type'] !== 'audio' ) {
$atts['type'] = 'video';
}
$args = array(
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => $atts['type'],
'order' => $atts['order'],
'orderby' => $atts['orderby'],
);
if ( ! empty( $atts['include'] ) ) {
$args['include'] = $atts['include'];
$_attachments = get_posts( $args );
$attachments = array();
foreach ( $_attachments as $key => $val ) {
$attachments[ $val->ID ] = $_attachments[ $key ];
}
} elseif ( ! empty( $atts['exclude'] ) ) {
$args['post_parent'] = $id;
$args['exclude'] = $atts['exclude'];
$attachments = get_children( $args );
} else {
$args['post_parent'] = $id;
$attachments = get_children( $args );
}
if ( empty( $attachments ) ) {
return '';
}
if ( is_feed() ) {
$output = "\n";
foreach ( $attachments as $att_id => $attachment ) {
$output .= wp_get_attachment_link( $att_id ) . "\n";
}
return $output;
}
$outer = 22; // default padding and border of wrapper
$default_width = 640;
$default_height = 360;
$theme_width = empty( $content_width ) ? $default_width : ( $content_width - $outer );
$theme_height = empty( $content_width ) ? $default_height : round( ( $default_height * $theme_width ) / $default_width );
$data = array(
'type' => $atts['type'],
// don't pass strings to JSON, will be truthy in JS
'tracklist' => wp_validate_boolean( $atts['tracklist'] ),
'tracknumbers' => wp_validate_boolean( $atts['tracknumbers'] ),
'images' => wp_validate_boolean( $atts['images'] ),
'artists' => wp_validate_boolean( $atts['artists'] ),
);
$tracks = array();
foreach ( $attachments as $attachment ) {
$url = wp_get_attachment_url( $attachment->ID );
$ftype = wp_check_filetype( $url, wp_get_mime_types() );
$track = array(
'src' => $url,
'type' => $ftype['type'],
'title' => $attachment->post_title,
'caption' => $attachment->post_excerpt,
'description' => $attachment->post_content,
);
$track['meta'] = array();
$meta = wp_get_attachment_metadata( $attachment->ID );
if ( ! empty( $meta ) ) {
foreach ( wp_get_attachment_id3_keys( $attachment ) as $key => $label ) {
if ( ! empty( $meta[ $key ] ) ) {
$track['meta'][ $key ] = $meta[ $key ];
}
}
if ( 'video' === $atts['type'] ) {
if ( ! empty( $meta['width'] ) && ! empty( $meta['height'] ) ) {
$width = $meta['width'];
$height = $meta['height'];
$theme_height = round( ( $height * $theme_width ) / $width );
} else {
$width = $default_width;
$height = $default_height;
}
$track['dimensions'] = array(
'original' => compact( 'width', 'height' ),
'resized' => array(
'width' => $theme_width,
'height' => $theme_height,
),
);
}
}
if ( $atts['images'] ) {
$thumb_id = get_post_thumbnail_id( $attachment->ID );
if ( ! empty( $thumb_id ) ) {
list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, 'full' );
$track['image'] = compact( 'src', 'width', 'height' );
list( $src, $width, $height ) = wp_get_attachment_image_src( $thumb_id, 'thumbnail' );
$track['thumb'] = compact( 'src', 'width', 'height' );
} else {
$src = wp_mime_type_icon( $attachment->ID );
$width = 48;
$height = 64;
$track['image'] = compact( 'src', 'width', 'height' );
$track['thumb'] = compact( 'src', 'width', 'height' );
}
}
$tracks[] = $track;
}
$data['tracks'] = $tracks;
$safe_type = esc_attr( $atts['type'] );
$safe_style = esc_attr( $atts['style'] );
ob_start();
if ( 1 === $instance ) {
/**
* Prints and enqueues playlist scripts, styles, and JavaScript templates.
*
* @since 3.9.0
*
* @param string $type Type of playlist. Possible values are 'audio' or 'video'.
* @param string $style The 'theme' for the playlist. Core provides 'light' and 'dark'.
*/
do_action( 'wp_playlist_scripts', $atts['type'], $atts['style'] );
}
?>
<div class="wp-playlist wp-<?php echo $safe_type; ?>-playlist wp-playlist-<?php echo $safe_style; ?>">
<?php if ( 'audio' === $atts['type'] ) : ?>
<div class="wp-playlist-current-item"></div>
<?php endif ?>
<<?php echo $safe_type; ?> controls="controls" preload="none" width="
<?php
echo (int) $theme_width;
?>
"
<?php
if ( 'video' === $safe_type ) :
echo ' height="', (int) $theme_height, '"';
endif;
?>
></<?php echo $safe_type; ?>>
<div class="wp-playlist-next"></div>
<div class="wp-playlist-prev"></div>
<noscript>
<ol>
<?php
foreach ( $attachments as $att_id => $attachment ) {
printf( '<li>%s</li>', wp_get_attachment_link( $att_id ) );
}
?>
</ol>
</noscript>
<script type="application/json" class="wp-playlist-script"><?php echo wp_json_encode( $data ); ?></script>
</div>
<?php
return ob_get_clean();
}
add_shortcode( 'playlist', 'wp_playlist_shortcode' );
/**
* Provides a No-JS Flash fallback as a last resort for audio / video.
*
* @since 3.6.0
*
* @param string $url The media element URL.
* @return string Fallback HTML.
*/
function wp_mediaelement_fallback( $url ) {
/**
* Filters the Mediaelement fallback output for no-JS.
*
* @since 3.6.0
*
* @param string $output Fallback output for no-JS.
* @param string $url Media file URL.
*/
return apply_filters( 'wp_mediaelement_fallback', sprintf( '<a href="%1$s">%1$s</a>', esc_url( $url ) ), $url );
}
/**
* Returns a filtered list of WP-supported audio formats.
*
* @since 3.6.0
*
* @return array Supported audio formats.
*/
function wp_get_audio_extensions() {
/**
* Filters the list of supported audio formats.
*
* @since 3.6.0
*
* @param array $extensions An array of supported audio formats. Defaults are
* 'mp3', 'ogg', 'flac', 'm4a', 'wav'.
*/
return apply_filters( 'wp_audio_extensions', array( 'mp3', 'ogg', 'flac', 'm4a', 'wav' ) );
}
/**
* Returns useful keys to use to lookup data from an attachment's stored metadata.
*
* @since 3.9.0
*
* @param WP_Post $attachment The current attachment, provided for context.
* @param string $context Optional. The context. Accepts 'edit', 'display'. Default 'display'.
* @return array Key/value pairs of field keys to labels.
*/
function wp_get_attachment_id3_keys( $attachment, $context = 'display' ) {
$fields = array(
'artist' => __( 'Artist' ),
'album' => __( 'Album' ),
);
if ( 'display' === $context ) {
$fields['genre'] = __( 'Genre' );
$fields['year'] = __( 'Year' );
$fields['length_formatted'] = _x( 'Length', 'video or audio' );
} elseif ( 'js' === $context ) {
$fields['bitrate'] = __( 'Bitrate' );
$fields['bitrate_mode'] = __( 'Bitrate Mode' );
}
/**
* Filters the editable list of keys to look up data from an attachment's metadata.
*
* @since 3.9.0
*
* @param array $fields Key/value pairs of field keys to labels.
* @param WP_Post $attachment Attachment object.
* @param string $context The context. Accepts 'edit', 'display'. Default 'display'.
*/
return apply_filters( 'wp_get_attachment_id3_keys', $fields, $attachment, $context );
}
/**
* Builds the Audio shortcode output.
*
* This implements the functionality of the Audio Shortcode for displaying
* WordPress mp3s in a post.
*
* @since 3.6.0
*
* @staticvar int $instance
*
* @param array $attr {
* Attributes of the audio shortcode.
*
* @type string $src URL to the source of the audio file. Default empty.
* @type string $loop The 'loop' attribute for the `<audio>` element. Default empty.
* @type string $autoplay The 'autoplay' attribute for the `<audio>` element. Default empty.
* @type string $preload The 'preload' attribute for the `<audio>` element. Default 'none'.
* @type string $class The 'class' attribute for the `<audio>` element. Default 'wp-audio-shortcode'.
* @type string $style The 'style' attribute for the `<audio>` element. Default 'width: 100%;'.
* }
* @param string $content Shortcode content.
* @return string|void HTML content to display audio.
*/
function wp_audio_shortcode( $attr, $content = '' ) {
$post_id = get_post() ? get_the_ID() : 0;
static $instance = 0;
$instance++;
/**
* Filters the default audio shortcode output.
*
* If the filtered output isn't empty, it will be used instead of generating the default audio template.
*
* @since 3.6.0
*
* @param string $html Empty variable to be replaced with shortcode markup.
* @param array $attr Attributes of the shortcode. @see wp_audio_shortcode()
* @param string $content Shortcode content.
* @param int $instance Unique numeric ID of this audio shortcode instance.
*/
$override = apply_filters( 'wp_audio_shortcode_override', '', $attr, $content, $instance );
if ( '' !== $override ) {
return $override;
}
$audio = null;
$default_types = wp_get_audio_extensions();
$defaults_atts = array(
'src' => '',
'loop' => '',
'autoplay' => '',
'preload' => 'none',
'class' => 'wp-audio-shortcode',
'style' => 'width: 100%;',
);
foreach ( $default_types as $type ) {
$defaults_atts[ $type ] = '';
}
$atts = shortcode_atts( $defaults_atts, $attr, 'audio' );
$primary = false;
if ( ! empty( $atts['src'] ) ) {
$type = wp_check_filetype( $atts['src'], wp_get_mime_types() );
if ( ! in_array( strtolower( $type['ext'] ), $default_types ) ) {
return sprintf( '<a class="wp-embedded-audio" href="%s">%s</a>', esc_url( $atts['src'] ), esc_html( $atts['src'] ) );
}
$primary = true;
array_unshift( $default_types, 'src' );
} else {
foreach ( $default_types as $ext ) {
if ( ! empty( $atts[ $ext ] ) ) {
$type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );
if ( strtolower( $type['ext'] ) === $ext ) {
$primary = true;
}
}
}
}
if ( ! $primary ) {
$audios = get_attached_media( 'audio', $post_id );
if ( empty( $audios ) ) {
return;
}
$audio = reset( $audios );
$atts['src'] = wp_get_attachment_url( $audio->ID );
if ( empty( $atts['src'] ) ) {
return;
}
array_unshift( $default_types, 'src' );
}
/**
* Filters the media library used for the audio shortcode.
*
* @since 3.6.0
*
* @param string $library Media library used for the audio shortcode.
*/
$library = apply_filters( 'wp_audio_shortcode_library', 'mediaelement' );
if ( 'mediaelement' === $library && did_action( 'init' ) ) {
wp_enqueue_style( 'wp-mediaelement' );
wp_enqueue_script( 'wp-mediaelement' );
}
/**
* Filters the class attribute for the audio shortcode output container.
*
* @since 3.6.0
* @since 4.9.0 The `$atts` parameter was added.
*
* @param string $class CSS class or list of space-separated classes.
* @param array $atts Array of audio shortcode attributes.
*/
$atts['class'] = apply_filters( 'wp_audio_shortcode_class', $atts['class'], $atts );
$html_atts = array(
'class' => $atts['class'],
'id' => sprintf( 'audio-%d-%d', $post_id, $instance ),
'loop' => wp_validate_boolean( $atts['loop'] ),
'autoplay' => wp_validate_boolean( $atts['autoplay'] ),
'preload' => $atts['preload'],
'style' => $atts['style'],
);
// These ones should just be omitted altogether if they are blank
foreach ( array( 'loop', 'autoplay', 'preload' ) as $a ) {
if ( empty( $html_atts[ $a ] ) ) {
unset( $html_atts[ $a ] );
}
}
$attr_strings = array();
foreach ( $html_atts as $k => $v ) {
$attr_strings[] = $k . '="' . esc_attr( $v ) . '"';
}
$html = '';
if ( 'mediaelement' === $library && 1 === $instance ) {
$html .= "<!--[if lt IE 9]><script>document.createElement('audio');</script><![endif]-->\n";
}
$html .= sprintf( '<audio %s controls="controls">', join( ' ', $attr_strings ) );
$fileurl = '';
$source = '<source type="%s" src="%s" />';
foreach ( $default_types as $fallback ) {
if ( ! empty( $atts[ $fallback ] ) ) {
if ( empty( $fileurl ) ) {
$fileurl = $atts[ $fallback ];
}
$type = wp_check_filetype( $atts[ $fallback ], wp_get_mime_types() );
$url = add_query_arg( '_', $instance, $atts[ $fallback ] );
$html .= sprintf( $source, $type['type'], esc_url( $url ) );
}
}
if ( 'mediaelement' === $library ) {
$html .= wp_mediaelement_fallback( $fileurl );
}
$html .= '</audio>';
/**
* Filters the audio shortcode output.
*
* @since 3.6.0
*
* @param string $html Audio shortcode HTML output.
* @param array $atts Array of audio shortcode attributes.
* @param string $audio Audio file.
* @param int $post_id Post ID.
* @param string $library Media library used for the audio shortcode.
*/
return apply_filters( 'wp_audio_shortcode', $html, $atts, $audio, $post_id, $library );
}
add_shortcode( 'audio', 'wp_audio_shortcode' );
/**
* Returns a filtered list of WP-supported video formats.
*
* @since 3.6.0
*
* @return array List of supported video formats.
*/
function wp_get_video_extensions() {
/**
* Filters the list of supported video formats.
*
* @since 3.6.0
*
* @param array $extensions An array of supported video formats. Defaults are
* 'mp4', 'm4v', 'webm', 'ogv', 'flv'.
*/
return apply_filters( 'wp_video_extensions', array( 'mp4', 'm4v', 'webm', 'ogv', 'flv' ) );
}
/**
* Builds the Video shortcode output.
*
* This implements the functionality of the Video Shortcode for displaying
* WordPress mp4s in a post.
*
* @since 3.6.0
*
* @global int $content_width
* @staticvar int $instance
*
* @param array $attr {
* Attributes of the shortcode.
*
* @type string $src URL to the source of the video file. Default empty.
* @type int $height Height of the video embed in pixels. Default 360.
* @type int $width Width of the video embed in pixels. Default $content_width or 640.
* @type string $poster The 'poster' attribute for the `<video>` element. Default empty.
* @type string $loop The 'loop' attribute for the `<video>` element. Default empty.
* @type string $autoplay The 'autoplay' attribute for the `<video>` element. Default empty.
* @type string $preload The 'preload' attribute for the `<video>` element.
* Default 'metadata'.
* @type string $class The 'class' attribute for the `<video>` element.
* Default 'wp-video-shortcode'.
* }
* @param string $content Shortcode content.
* @return string|void HTML content to display video.
*/
function wp_video_shortcode( $attr, $content = '' ) {
global $content_width;
$post_id = get_post() ? get_the_ID() : 0;
static $instance = 0;
$instance++;
/**
* Filters the default video shortcode output.
*
* If the filtered output isn't empty, it will be used instead of generating
* the default video template.
*
* @since 3.6.0
*
* @see wp_video_shortcode()
*
* @param string $html Empty variable to be replaced with shortcode markup.
* @param array $attr Attributes of the shortcode. @see wp_video_shortcode()
* @param string $content Video shortcode content.
* @param int $instance Unique numeric ID of this video shortcode instance.
*/
$override = apply_filters( 'wp_video_shortcode_override', '', $attr, $content, $instance );
if ( '' !== $override ) {
return $override;
}
$video = null;
$default_types = wp_get_video_extensions();
$defaults_atts = array(
'src' => '',
'poster' => '',
'loop' => '',
'autoplay' => '',
'preload' => 'metadata',
'width' => 640,
'height' => 360,
'class' => 'wp-video-shortcode',
);
foreach ( $default_types as $type ) {
$defaults_atts[ $type ] = '';
}
$atts = shortcode_atts( $defaults_atts, $attr, 'video' );
if ( is_admin() ) {
// shrink the video so it isn't huge in the admin
if ( $atts['width'] > $defaults_atts['width'] ) {
$atts['height'] = round( ( $atts['height'] * $defaults_atts['width'] ) / $atts['width'] );
$atts['width'] = $defaults_atts['width'];
}
} else {
// if the video is bigger than the theme
if ( ! empty( $content_width ) && $atts['width'] > $content_width ) {
$atts['height'] = round( ( $atts['height'] * $content_width ) / $atts['width'] );
$atts['width'] = $content_width;
}
}
$is_vimeo = $is_youtube = false;
$yt_pattern = '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#';
$vimeo_pattern = '#^https?://(.+\.)?vimeo\.com/.*#';
$primary = false;
if ( ! empty( $atts['src'] ) ) {
$is_vimeo = ( preg_match( $vimeo_pattern, $atts['src'] ) );
$is_youtube = ( preg_match( $yt_pattern, $atts['src'] ) );
if ( ! $is_youtube && ! $is_vimeo ) {
$type = wp_check_filetype( $atts['src'], wp_get_mime_types() );
if ( ! in_array( strtolower( $type['ext'] ), $default_types ) ) {
return sprintf( '<a class="wp-embedded-video" href="%s">%s</a>', esc_url( $atts['src'] ), esc_html( $atts['src'] ) );
}
}
if ( $is_vimeo ) {
wp_enqueue_script( 'mediaelement-vimeo' );
}
$primary = true;
array_unshift( $default_types, 'src' );
} else {
foreach ( $default_types as $ext ) {
if ( ! empty( $atts[ $ext ] ) ) {
$type = wp_check_filetype( $atts[ $ext ], wp_get_mime_types() );
if ( strtolower( $type['ext'] ) === $ext ) {
$primary = true;
}
}
}
}
if ( ! $primary ) {
$videos = get_attached_media( 'video', $post_id );
if ( empty( $videos ) ) {
return;
}
$video = reset( $videos );
$atts['src'] = wp_get_attachment_url( $video->ID );
if ( empty( $atts['src'] ) ) {
return;
}
array_unshift( $default_types, 'src' );
}
/**
* Filters the media library used for the video shortcode.
*
* @since 3.6.0
*
* @param string $library Media library used for the video shortcode.
*/
$library = apply_filters( 'wp_video_shortcode_library', 'mediaelement' );
if ( 'mediaelement' === $library && did_action( 'init' ) ) {
wp_enqueue_style( 'wp-mediaelement' );
wp_enqueue_script( 'wp-mediaelement' );
wp_enqueue_script( 'mediaelement-vimeo' );
}
// Mediaelement has issues with some URL formats for Vimeo and YouTube, so
// update the URL to prevent the ME.js player from breaking.
if ( 'mediaelement' === $library ) {
if ( $is_youtube ) {
// Remove `feature` query arg and force SSL - see #40866.
$atts['src'] = remove_query_arg( 'feature', $atts['src'] );
$atts['src'] = set_url_scheme( $atts['src'], 'https' );
} elseif ( $is_vimeo ) {
// Remove all query arguments and force SSL - see #40866.
$parsed_vimeo_url = wp_parse_url( $atts['src'] );
$vimeo_src = 'https://' . $parsed_vimeo_url['host'] . $parsed_vimeo_url['path'];
// Add loop param for mejs bug - see #40977, not needed after #39686.
$loop = $atts['loop'] ? '1' : '0';
$atts['src'] = add_query_arg( 'loop', $loop, $vimeo_src );
}
}
/**
* Filters the class attribute for the video shortcode output container.
*
* @since 3.6.0
* @since 4.9.0 The `$atts` parameter was added.
*
* @param string $class CSS class or list of space-separated classes.
* @param array $atts Array of video shortcode attributes.
*/
$atts['class'] = apply_filters( 'wp_video_shortcode_class', $atts['class'], $atts );
$html_atts = array(
'class' => $atts['class'],
'id' => sprintf( 'video-%d-%d', $post_id, $instance ),
'width' => absint( $atts['width'] ),
'height' => absint( $atts['height'] ),
'poster' => esc_url( $atts['poster'] ),
'loop' => wp_validate_boolean( $atts['loop'] ),
'autoplay' => wp_validate_boolean( $atts['autoplay'] ),
'preload' => $atts['preload'],
);
// These ones should just be omitted altogether if they are blank
foreach ( array( 'poster', 'loop', 'autoplay', 'preload' ) as $a ) {
if ( empty( $html_atts[ $a ] ) ) {
unset( $html_atts[ $a ] );
}
}
$attr_strings = array();
foreach ( $html_atts as $k => $v ) {
$attr_strings[] = $k . '="' . esc_attr( $v ) . '"';
}
$html = '';
if ( 'mediaelement' === $library && 1 === $instance ) {
$html .= "<!--[if lt IE 9]><script>document.createElement('video');</script><![endif]-->\n";
}
$html .= sprintf( '<video %s controls="controls">', join( ' ', $attr_strings ) );
$fileurl = '';
$source = '<source type="%s" src="%s" />';
foreach ( $default_types as $fallback ) {
if ( ! empty( $atts[ $fallback ] ) ) {
if ( empty( $fileurl ) ) {
$fileurl = $atts[ $fallback ];
}
if ( 'src' === $fallback && $is_youtube ) {
$type = array( 'type' => 'video/youtube' );
} elseif ( 'src' === $fallback && $is_vimeo ) {
$type = array( 'type' => 'video/vimeo' );
} else {
$type = wp_check_filetype( $atts[ $fallback ], wp_get_mime_types() );
}
$url = add_query_arg( '_', $instance, $atts[ $fallback ] );
$html .= sprintf( $source, $type['type'], esc_url( $url ) );
}
}
if ( ! empty( $content ) ) {
if ( false !== strpos( $content, "\n" ) ) {
$content = str_replace( array( "\r\n", "\n", "\t" ), '', $content );
}
$html .= trim( $content );
}
if ( 'mediaelement' === $library ) {
$html .= wp_mediaelement_fallback( $fileurl );
}
$html .= '</video>';
$width_rule = '';
if ( ! empty( $atts['width'] ) ) {
$width_rule = sprintf( 'width: %dpx;', $atts['width'] );
}
$output = sprintf( '<div style="%s" class="wp-video">%s</div>', $width_rule, $html );
/**
* Filters the output of the video shortcode.
*
* @since 3.6.0
*
* @param string $output Video shortcode HTML output.
* @param array $atts Array of video shortcode attributes.
* @param string $video Video file.
* @param int $post_id Post ID.
* @param string $library Media library used for the video shortcode.
*/
return apply_filters( 'wp_video_shortcode', $output, $atts, $video, $post_id, $library );
}
add_shortcode( 'video', 'wp_video_shortcode' );
/**
* Displays previous image link that has the same post parent.
*
* @since 2.5.0
*
* @see adjacent_image_link()
*
* @param string|array $size Optional. Image size. Accepts any valid image size, an array of width and
* height values in pixels (in that order), 0, or 'none'. 0 or 'none' will
* default to 'post_title' or `$text`. Default 'thumbnail'.
* @param string $text Optional. Link text. Default false.
*/
function previous_image_link( $size = 'thumbnail', $text = false ) {
adjacent_image_link( true, $size, $text );
}
/**
* Displays next image link that has the same post parent.
*
* @since 2.5.0
*
* @see adjacent_image_link()
*
* @param string|array $size Optional. Image size. Accepts any valid image size, an array of width and
* height values in pixels (in that order), 0, or 'none'. 0 or 'none' will
* default to 'post_title' or `$text`. Default 'thumbnail'.
* @param string $text Optional. Link text. Default false.
*/
function next_image_link( $size = 'thumbnail', $text = false ) {
adjacent_image_link( false, $size, $text );
}
/**
* Displays next or previous image link that has the same post parent.
*
* Retrieves the current attachment object from the $post global.
*
* @since 2.5.0
*
* @param bool $prev Optional. Whether to display the next (false) or previous (true) link. Default true.
* @param string|array $size Optional. Image size. Accepts any valid image size, or an array of width and height
* values in pixels (in that order). Default 'thumbnail'.
* @param bool $text Optional. Link text. Default false.
*/
function adjacent_image_link( $prev = true, $size = 'thumbnail', $text = false ) {
$post = get_post();
$attachments = array_values(
get_children(
array(
'post_parent' => $post->post_parent,
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => 'ASC',
'orderby' => 'menu_order ID',
)
)
);
foreach ( $attachments as $k => $attachment ) {
if ( $attachment->ID == $post->ID ) {
break;
}
}
$output = '';
$attachment_id = 0;
if ( $attachments ) {
$k = $prev ? $k - 1 : $k + 1;
if ( isset( $attachments[ $k ] ) ) {
$attachment_id = $attachments[ $k ]->ID;
$output = wp_get_attachment_link( $attachment_id, $size, true, false, $text );
}
}
$adjacent = $prev ? 'previous' : 'next';
/**
* Filters the adjacent image link.
*
* The dynamic portion of the hook name, `$adjacent`, refers to the type of adjacency,
* either 'next', or 'previous'.
*
* @since 3.5.0
*
* @param string $output Adjacent image HTML markup.
* @param int $attachment_id Attachment ID
* @param string $size Image size.
* @param string $text Link text.
*/
echo apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text );
}
/**
* Retrieves taxonomies attached to given the attachment.
*
* @since 2.5.0
* @since 4.7.0 Introduced the `$output` parameter.
*
* @param int|array|object $attachment Attachment ID, data array, or data object.
* @param string $output Output type. 'names' to return an array of taxonomy names,
* or 'objects' to return an array of taxonomy objects.
* Default is 'names'.
* @return array Empty array on failure. List of taxonomies on success.
*/
function get_attachment_taxonomies( $attachment, $output = 'names' ) {
if ( is_int( $attachment ) ) {
$attachment = get_post( $attachment );