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trackback_url_list( string $tb_list, int $post_id )

Do trackbacks for a list of URLs.

Parameters

$tb_list

(string) (Required) Comma separated list of URLs.

$post_id

(int) (Required) Post ID.

Source

File: wp-includes/post.php 

function trackback_url_list( $tb_list, $post_id ) {
	if ( ! empty( $tb_list ) ) {
		// Get post data.
		$postdata = get_post( $post_id, ARRAY_A );

		// 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 );
		}
	}
}

Uses

Uses Description
wp-includes/formatting.php: wp_unslash()

Remove slashes from a string or array of strings.
wp-includes/post.php: get_post()

Retrieves post data given a post ID or post object.
wp-includes/comment.php: trackback()

Send a Trackback.

Changelog

Version Description
1.0.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/trackback_url_list