AS3CF_Filter::get_urls_from_img_src PHP Метод

    protected function get_urls_from_img_src($content, &$to_cache)
    {
        $url_pairs = array();
        if (!preg_match_all('/<img [^>]+>/', $content, $matches) || !isset($matches[0])) {
            // No img tags found, return
            return $url_pairs;
        }
        $matches = array_unique($matches[0]);
        $attachment_ids = array();
        foreach ($matches as $image) {
            if (!preg_match('/src=\\\\?["\']+([^"\'\\\\]+)/', $image, $src) || !isset($src[1])) {
                // Can't determine URL, skip
                continue;
            }
            $url = $src[1];
            if (!$this->url_needs_replacing($url)) {
                // URL already correct, skip
                continue;
            }
            if (!preg_match('/wp-image-([0-9]+)/i', $image, $class_id) || !isset($class_id[1])) {
                // Can't determine ID from class, skip
                continue;
            }
            $attachment_ids[$url] = absint($class_id[1]);
        }
        if (count($attachment_ids) > 1) {
            /*
             * Warm object cache for use with 'get_post_meta()'.
             *
             * To avoid making a database call for each image, a single query
             * warms the object cache with the meta information for all images.
             */
            update_meta_cache('post', array_unique(array_values($attachment_ids)));
        }
        foreach ($attachment_ids as $url => $attachment_id) {
            if (!$this->attachment_id_matches_src($attachment_id, $url)) {
                // Path doesn't match attachment, skip
                continue;
            }
            $this->push_to_url_pairs($url_pairs, $attachment_id, $url, $to_cache);
        }
        return $url_pairs;
    }