wp-includes/post.php:6169Does trackbacks for a list of URLs.
$tb_liststring$post_idintfunction trackback_url_list( $tb_list, $post_id ) { if ( ! empty( $tb_list ) ) { // Get post data. $post = get_post( $post_id ); if ( ! $post ) { return; } $postdata = $post->to_array(); // Form an excerpt. $excerpt = strip_tags( $postdata['post_excerpt'] ? $postdata['post_excerpt'] : $postdata['post_content'] ); if ( strlen( $excerpt ) > 255 ) { $excerpt = substr( $excerpt, 0, 252 ) . '…'; } $trackback_urls = explode( ',', $tb_list ); foreach ( (array) $trackback_urls as $tb_url ) { $tb_url = trim( $tb_url ); trackback( $tb_url, wp_unslash( $postdata['post_title'] ), $excerpt, $post_id ); } }}Introduced in 1.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.