wp-includes/comment.php:2992Performs trackbacks.
$postint|WP_Postvoid|false3 hooks fire while do_trackbacks() runs, in this order:
function do_trackbacks( $post ) { global $wpdb; $post = get_post( $post ); if ( ! $post ) { return false; } $to_ping = get_to_ping( $post ); $pinged = get_pung( $post ); if ( empty( $to_ping ) ) { $wpdb->update( $wpdb->posts, array( 'to_ping' => '' ), array( 'ID' => $post->ID ) ); return; } if ( empty( $post->post_excerpt ) ) { /** This filter is documented in wp-includes/post-template.php */ $excerpt = apply_filters( 'the_content', $post->post_content, $post->ID ); } else { /** This filter is documented in wp-includes/post-template.php */ $excerpt = apply_filters( 'the_excerpt', $post->post_excerpt ); } $excerpt = str_replace( ']]>', ']]>', $excerpt ); $excerpt = wp_html_excerpt( $excerpt, 252, '…' ); /** This filter is documented in wp-includes/post-template.php */ $post_title = apply_filters( 'the_title', $post->post_title, $post->ID ); $post_title = strip_tags( $post_title ); if ( $to_ping ) { foreach ( (array) $to_ping as $tb_ping ) { $tb_ping = trim( $tb_ping ); if ( ! in_array( $tb_ping, $pinged, true ) ) { trackback( $tb_ping, $post_title, $excerpt, $post->ID ); $pinged[] = $tb_ping; } else { $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, %s, '')) WHERE ID = %d", $tb_ping, $post->ID ) ); } } }}Introduced in 1.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/comment.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.