Slika - simple image handling for PHP

This is a library that covers only the bare basics you need when handling images:

• resizing
• cropping
• rotation

It can use either PHP's libGD or a locally installed ImageMagick binary.

Installation

Use composer

composer require splitbrain/slika

Usage

Simply get an Adapter from the Slika factory, run some operations on it and call save.

Operations can be chained together. Consider the chain to be one command. Do not reuse the adapter returned by run(), it is a single use object. All operations can potentially throw a \splitbrain\slika\Exception.

Options (see below) can be passed as a second parameter to the run factory.

use \splitbrain\slika\Slika;
use \splitbrain\slika\Exception;

$options = [
    'quality' => 75
];

try {
    Slika::run('input.png', $options)
        ->resize(500,500)
        ->rotate(Slika::ROTATE_CCW
        ->save('output.jpg', 'jpg');
} catch (Exception $e) {
    // conversion went wrong, handle it
}

Please also check the API Docs for details.

Operations

resize

All resize operations will keep the original aspect ratio of the image. There will be no distortion.

Keeping either width or height at zero will auto calculate the value for you.

# fit the image into a bounding box of 500x500 pixels
Slika::run('input.jpg')->resize(500,500)->save('output.png', 'png');

# adjust the image to a maximum width of 500 pixels 
Slika::run('input.jpg')->resize(500,0)->save('output.png', 'png');

# adjust the image to a maximum height of 500 pixels 
Slika::run('input.jpg')->resize(0,500)->save('output.png', 'png');

crop

Similar to resizing, but this time the image will be cropped to fit the new aspect ratio.

Slika::run('input.jpg')->crop(500,500)->save('output.png', 'png');

rotate

Rotates the image. The parameter passed is one of the EXIF orientation flags:

For your convenience there are three Constants defined:

• Slika::ROTATE_CCW counter clockwise rotation
• Slika::ROTATE_CW clockwise rotation
• Slika::ROTATE_TOPDOWN full 180 degree rotation

Slika::run('input.jpg')->rotate(Slika::ROTATE_CW)->save('output.png', 'png');

autorotate

Rotates the image according to the EXIF rotation tag if found.

Slika::run('input.jpg')->autorotate()->save('output.png', 'png');

Options

Options can be passed as associatiave array as the second parameter in Slika::run.

The following options are availble currently:

Option	Default	Description
imconvert	/usr/bin/convert	The path to ImageMagick's convert binary
quality	92	The quality when writing JPEG images