elements $embeds = $this->extract_embeds( $content ); foreach ( $embeds as $embed ) { //Do we know how to handle this embed? (first-pass verification) if ( strpos( $embed['attributes']['src'], $this->url_search_string ) === false ) { continue; } //Get the original URL of the embedded object (may perform more complex verification) $url = $this->link_url_from_src( $embed['attributes']['src'] ); if ( empty( $url ) ) { continue; } //Create a new link instance. $instance = new blcLinkInstance(); $instance->set_parser( $this ); $instance->raw_url = $embed['embed_code']; $instance->link_text = '[' . $this->short_title . ']'; $link_obj = new blcLink( $url ); //Creates or loads the link $instance->set_link( $link_obj ); $instances[] = $instance; } return $instances; } /** * Extract embedded elements from a HTML string. * * This function returns an array of elements found in the input * string. Embeds without a 'src' attribute are skipped. * * Each array item has the same basic structure as the array items * returned by blcUtility::extract_tags(), plus an additional 'embed_code' key * that contains the HTML code for the element. If the embed element is wrapped * in an , the 'embed_code' key contains the full HTML for the entire * + structure. * * @uses blcUtility::extract_tags() This function is a simple wrapper around extract_tags() * * @param string $html * @return array */ function extract_embeds( $html ) { $results = array(); //remove all blocks first $html = preg_replace( '/]*>.+?<\/code>/si', ' ', $html ); //Find likely-looking elements $objects = blcUtility::extract_tags( $html, 'object', false, true ); foreach ( $objects as $candidate ) { //Find the tag $embed = blcUtility::extract_tags( $candidate['full_tag'], 'embed', true ); if ( empty( $embed ) ) { continue; } $embed = reset( $embed ); //Take the first (and only) found element if ( empty( $embed['attributes']['src'] ) ) { continue; } $embed['embed_code'] = $candidate['full_tag']; $results[] = $embed; //Remove the element so it doesn't come up when we search for plain elements. $html = str_replace( $candidate['full_tag'], ' ', $html ); } //Find elements not wrapped in an element. $embeds = blcUtility::extract_tags( $html, 'embed', true, true ); foreach ( $embeds as $embed ) { if ( ! empty( $embed['attributes']['src'] ) ) { $embed['embed_code'] = $embed['full_tag']; $results[] = $embed; } } return $results; } /** * Remove all occurrences of the specified embed from a string. * * @param string $content Look for embeds in this string. * @param string $url Ignored. * @param string $embed_code The full embed code to look for. * @return string Input string with all matching embeds removed. */ function unlink( $content, $url, $embed_code ) { if ( empty( $embed_code ) ) { return $content; } return str_replace( $embed_code, '', $content ); //Super-simple. } /** * Get the link text for printing in the "Broken Links" table. * * @param blcLinkInstance $instance * @param string $context * @return string HTML */ function ui_get_link_text( $instance, $context = 'display' ) { $image_url = sprintf( '/images/%s.png', $this->parser_type ); $image_html = sprintf( '%2$s ', esc_attr( plugins_url( $image_url, BLC_PLUGIN_FILE_LEGACY ) ), $this->long_title ); $field_html = sprintf( '%s', $this->short_title ); if ( 'email' != $context ) { $field_html = $image_html . $field_html; } return $field_html; } /** * Determine the original URL of an embedded object by analysing its SRC attribute. * * For example, if the object in question is an embedded YouTube video, this * method should return the URL of the original video; e.g. 'http://www.youtube.com/watch?v=example1234' * * Should be overridden in a sub-class. * * @param string $src * @return string The URL of the embedded object, or an empty string if the URL can't be determined. */ function link_url_from_src( $src ) { return ''; } /** * Editing is disabled in embed parsers. Calling this function will yield an instance of WP_Error. * * @param string $content * @param string $new_url * @param string $old_url * @param string $old_raw_url * @return WP_Error */ function edit( $content, $new_url, $old_url, $old_raw_url ) { return new WP_Error( 'not_implemented', sprintf( __( "Embedded videos can't be edited using Broken Link Checker. Please edit or replace the video in question manually.", 'broken-link-checker' ), $this->parser_type ) ); } public function is_url_editable() { return false; } } endif;