functions.php

<?php if (__FILE__ == $_SERVER['SCRIPT_FILENAME']) { die('Por favor no cargue esta p&aacute;gina directamente. &iexcl;Gracias!'); } 
//
// Archivos a incluir
//
include_once('include/seo.php');

//
// Elimina CSS de la barra de wp
//
//
add_filter('show_admin_bar', '__return_false');

//
// Imágenes destacadas
//
add_theme_support( 'post-thumbnails' ); 

//
// Recorta el extracto a n palabras
//
function gallo_excerpt( $length ) {
	return 30;
}
add_filter( 'excerpt_length', 'gallo_excerpt', 999 );

//
// Remueve el tag <p> en el extracto
//
remove_filter ('the_excerpt', 'wpautop');

//
// Cambio de posición de barra de WordPress
//
// function gallo_bottom_admin_bar() {
// echo '
// <style type="text/css">
// div#wpadminbar { top: auto; bottom: 0; position: fixed; }
// .ab-sub-wrapper { bottom: 32px; }
// html[lang] { margin-top: 0 !important; margin-bottom: 32px !important; }
// @media screen and (max-width: 782px){
// .ab-sub-wrapper { bottom: 46px; }
// html[lang] { margin-bottom: 46px !important; }
// }
// </style>'; 
// }
// add_action('wp_head', 'gallo_bottom_admin_bar', 100);

//
// Registro de menús
//
register_nav_menus(
	array(
		'nav-primary' => 'Menú principal',
	)
);

function gallo_custom_menu() {
	$menu_name = 'nav-primary'; // specify custom menu slug
	if (($locations = get_nav_menu_locations()) && isset($locations[$menu_name])) {
		$menu = wp_get_nav_menu_object($locations[$menu_name]);
		$menu_items = wp_get_nav_menu_items($menu->term_id);

		$menu_list .= "\t\t". '<ul class="navbar-nav mr-auto mt-2 mt-lg-0">' ."\n";
		foreach ((array) $menu_items as $key => $menu_item) {
			$title = $menu_item->title;
			$url = $menu_item->url;
			$menu_list .= "\t\t\t". '<li class="nav-item"><a class="nav-link" href="'. $url .'">'. $title .'</a></li>' ."\n";
		}
		$menu_list .= "\t\t". '</ul>' ."\n";
	} else {
		// $menu_list = '<!-- no list defined -->';
	}
	echo $menu_list;
}

//
// Función de paginación
// Basado en: https://www.wpbeginner.com/wp-themes/how-to-add-numeric-pagination-in-your-wordpress-theme/
//
function gallo_posts_nav() {

	if( is_singular() )
		return;

	global $wp_query;

	/** Stop execution if there's only 1 page */
	if( $wp_query->max_num_pages <= 1 )
		return;

	$paged = get_query_var( 'paged' ) ? absint( get_query_var( 'paged' ) ) : 1;
	$max   = intval( $wp_query->max_num_pages );

	/** Add current page to the array */
	if ( $paged >= 1 )
		$links[] = $paged;

	/** Add the pages around the current page to the array */
	if ( $paged >= 3 ) {
		$links[] = $paged - 1;
		$links[] = $paged - 2;
	}

	if ( ( $paged + 2 ) <= $max ) {
		$links[] = $paged + 2;
		$links[] = $paged + 1;
	}

	echo "\t\t\t\t\t" . '<div class="pagination">' . "\n";

	/** Previous Post Link */
	if ( get_previous_posts_link() )
		printf( "\t\t\t\t\t\t" . '<span class="ml-1 mr-1">%s</span>' . "\n", get_previous_posts_link('Recientes') );

	/** Link to first page, plus ellipses if necessary */
	if ( ! in_array( 1, $links ) ) {
		$class = 1 == $paged ? ' active ' : '';

		printf( "\t\t\t\t\t\t" . '<span class="ml-1 mr-1 %s"><a href="%s">%s</a></span>' . "\n", $class, esc_url( get_pagenum_link( 1 ) ), '1' );

		if ( ! in_array( 2, $links ) )
		echo "\t\t\t\t\t\t" . '<span class="ml-1 mr-1">…</span>' . "\n";
	}

	/** Link to current page, plus 2 pages in either direction if necessary */
	sort( $links );
	foreach ( (array) $links as $link ) {
		$class = $paged == $link ? ' active ' : '';
		printf( "\t\t\t\t\t\t" . '<span class="%s ml-1 mr-1"><a href="%s">%s</a></span>' . "\n", $class, esc_url( get_pagenum_link( $link ) ), $link );
	}

	/** Link to last page, plus ellipses if necessary */
	if ( ! in_array( $max, $links ) ) {
		if ( ! in_array( $max - 1, $links ) )
		echo "\t\t\t\t\t\t" . '<span class="ml-1 mr-1">…</span>' . "\n";

		$class = $paged == $max ? ' active ' : '';
		printf( "\t\t\t\t\t\t" . '<span class="ml-1 mr-1 %s"><a href="%s">%s</a></span>' . "\n", $class, esc_url( get_pagenum_link( $max ) ), $max );
	}

	/** Next Post Link */
	if ( get_next_posts_link() )
		printf( "\t\t\t\t\t\t" . '<span class="ml-1 mr-1">%s</span>' . "\n", get_next_posts_link('Anteriores') );
		echo "\t\t\t\t\t" . '</div>' . "\n";

}

//
// Rewrite Base
// Basado en una solución: https://wordpress.stackexchange.com/questions/57070/change-the-page-slug-in-pagination
//
function gallo_rewrite_rules() {
	global $wp_rewrite;
	// $wp_rewrite->author_base = $author_slug;
	//  print_r($wp_rewrite);
	$wp_rewrite->author_base		= 'autor';
	$wp_rewrite->search_base		= 'buscar';
	$wp_rewrite->comments_base		= 'comentarios';
	$wp_rewrite->pagination_base	= 'pagina';
	// para las categorías y etiquetas usar la administración de WordPress que permite cambiar la base
	$wp_rewrite->flush_rules();
}
add_action('init', 'gallo_rewrite_rules');

//
// Tiempo de lectura estimado
// Basado en: https://medium.com/@nadeem4uwebtech/how-to-add-reading-time-in-wordpress-without-using-plugin-d2e8af7b1239
//
function gallo_reading_time() {
	$content = get_post_field( 'post_content', $post->ID );
	$word_count = str_word_count( strip_tags( $content ) );
	$readingtime = ceil($word_count / 200);
	
	if ($readingtime == 1) {
		$timer = " min"; // singular
	} else {
		$timer = " min"; // plural
	}
	
	$totalreadingtime = $readingtime . $timer;
	return $totalreadingtime;
	
}

//
// Derivada del random_404() de telmeds
//
function gallo_cita_random() {
$vector = array(
	1 => "Es posible robar las ideas, pero nadie puede robar su puesta en práctica ni la pasión por ellas. (Timothy Ferriss).",
	2 => "La medicina es una ciencia de la incertidumbre y un arte de la probabilidad. (William Osler).",
	3 => "La medicina es el arte de disputar los hombres a la muerte de hoy, para cedérselos en mejor estado, un poco más tarde. (Noel Clarasó)",
);
$numero = rand(1,3);
echo "$vector[$numero]";
}

//
// Retorna solamente 6 tags en the_tags(), pero lo afecta globalmente
//
//add_filter('term_links-post_tag','limit_to_five_tags');
//
//function limit_to_five_tags($terms) {
//	return array_slice($terms,0,5,true);
//}

//
// Posts relacionados
// Basado en: https://wpcrumbs.com/how-to-display-related-posts-without-a-plugin/
//
function gallo_related_posts($args = array()) {
	global $post;

	// default args
	$args = wp_parse_args($args, array(
		'post_id' => !empty($post) ? $post->ID : '',
		'taxonomy' => 'category',
		'limit' => 3,
		'post_type' => !empty($post) ? $post->post_type : 'post',
		'orderby' => 'date',
		'order' => 'DESC'
	));

	// check taxonomy
	if (!taxonomy_exists($args['taxonomy'])) {
		return;
	}

	// post taxonomies
	$taxonomies = wp_get_post_terms($args['post_id'], $args['taxonomy'], array('fields' => 'ids'));

	if (empty($taxonomies)) {
		return;
	}

	// query
	$related_posts = get_posts(array(
		'post__not_in' => (array) $args['post_id'],
		'post_type' => $args['post_type'],
		'tax_query' => array(
			array(
				'taxonomy' => $args['taxonomy'],
				'field' => 'term_id',
				'terms' => $taxonomies
			),
		),
		'posts_per_page' => $args['limit'],
		'orderby' => $args['orderby'],
		'order' => $args['order']
	));

	include( locate_template('include/related-posts.php', false, false) );

	wp_reset_postdata();
}


//
//Social media share buttons
//
function gallo_share() {
	$url = urlencode(get_the_permalink());
	$title = urlencode(html_entity_decode(get_the_title(), ENT_COMPAT, 'UTF-8'));
	$media = urlencode(get_the_post_thumbnail_url(get_the_ID(), 'full'));

include( locate_template('include/share.php', false, false) );
}

//
// Limpia head del sitio
// https://gist.github.com/pedro-vasconcelos/ee96c1dd3907a0fdf125ef63c353c5f7
//
// REMOVE WP EMOJI
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');

remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
remove_action( 'admin_print_styles', 'print_emoji_styles' );

// First, we remove all the RSS feed links from wp_head using remove_action
remove_action( 'wp_head','feed_links', 2 );
remove_action( 'wp_head','feed_links_extra', 3 );

// Resource Hints is a rather new W3C specification that “defines the dns-prefetch,
// preconnect, prefetch, and prerender relationships of the HTML Link Element (<link>)”.
// These can be used to assist the browser in the decision process of which origins it
// should connect to, and which resources it should fetch and preprocess to improve page performance.
remove_action( 'wp_head', 'wp_resource_hints', 2 );

// Sends a Link header for the REST API.
// https://developer.wordpress.org/reference/functions/rest_output_link_header/
remove_action( 'template_redirect', 'rest_output_link_header', 11, 0 );

// Outputs the REST API link tag into page header.
// https://developer.wordpress.org/reference/functions/rest_output_link_wp_head/
remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );

// https://developer.wordpress.org/reference/functions/wp_oembed_add_discovery_links/
remove_action( 'wp_head', 'wp_oembed_add_discovery_links', 10 );

// WordPress Page/Post Shortlinks
// URL shortening is sometimes useful, but this automatic ugly url
// in your header is useless. There is no reason to keep this. None.
remove_action( 'wp_head', 'wp_shortlink_wp_head');

// Weblog Client Link
// Are you editing your WordPress blog using your browser?
// Then you are not using a blog client and this link can probably be removed.
// This link is also used by a few 3rd party sites/programs that use the XML-RPC request formats.
// One example is the Flickr API. So if you start having trouble with a 3rd party service that
// updates your blog, add this back in. Otherwise, remove it.
remove_action ('wp_head', 'rsd_link');

// Windows Live Writer Manifest Link
// If you don’t know what Windows Live Writer is (it’s another blog editing client), then remove this link.
remove_action( 'wp_head', 'wlwmanifest_link');

// WordPress Generator (with version information)
// This announces that you are running WordPress and what version you are using. It serves no purpose.
remove_action('wp_head', 'wp_generator');

function gallo_deregister_scripts(){
	wp_deregister_script( 'wp-embed' );
}
add_action( 'wp_footer', 'gallo_deregister_scripts' );

function gallo_cleanup_query_string( $src ){ 
	$parts = explode( '?', $src ); 
	return $parts[0]; 
} 
add_filter( 'script_loader_src', 'gallo_cleanup_query_string', 15, 1 ); 
add_filter( 'style_loader_src', 'gallo_cleanup_query_string', 15, 1 );