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<?php
if (!defined('ABSPATH')) {
die('No direct access allowed');
}
if (!class_exists('WPO_Yoast_SEO')) :
/**
* Adds compatibility for Yoast SEO plugin
*/
class WPO_Yoast_SEO {
/**
* Constructor
*/
private function __construct() {
if (!defined('WPSEO_VERSION')) return;
add_filter('wpo_get_posts_content_images_from_plugins', array($this, 'get_posts_content_images'), 10, 2);
}
/**
* Returns singleton instance
*
* @return WPO_Yoast_SEO
*/
public static function instance() {
static $_instance = null;
if (null === $_instance) {
$_instance = new self();
}
return $_instance;
}
/**
* Appends images array with images found in yoast seo plugin
*
* @param array $images
* @param int $post_id
*
* @return array
*/
public function get_posts_content_images($images, $post_id) {
$yoast_seo_facebook_images = get_post_meta($post_id, '_yoast_wpseo_opengraph-image-id', false);
$yoast_seo_twitter_images = get_post_meta($post_id, '_yoast_wpseo_twitter-image-id', false);
return array_merge($images, $yoast_seo_facebook_images, $yoast_seo_twitter_images);
}
}
endif;