trackback( string $trackback_url, string $title, string $excerpt, int $ID )

Send a Trackback.


Description

Updates database when sending trackback to prevent duplicates.


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Parameters

$trackback_url

(string) (Required) URL to send trackbacks.

$title

(string) (Required) Title of post.

$excerpt

(string) (Required) Excerpt of post.

$ID

(int) (Required) Post ID.


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Return

(int|false|void) Database query from update.


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Source

File: wp-includes/comment.php

function trackback( $trackback_url, $title, $excerpt, $ID ) {
	global $wpdb;

	if ( empty( $trackback_url ) ) {
		return;
	}

	$options            = array();
	$options['timeout'] = 10;
	$options['body']    = array(
		'title'     => $title,
		'url'       => get_permalink( $ID ),
		'blog_name' => get_option( 'blogname' ),
		'excerpt'   => $excerpt,
	);

	$response = wp_safe_remote_post( $trackback_url, $options );

	if ( is_wp_error( $response ) ) {
		return;
	}

	$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET pinged = CONCAT(pinged, '\n', %s) WHERE ID = %d", $trackback_url, $ID ) );
	return $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET to_ping = TRIM(REPLACE(to_ping, %s, '')) WHERE ID = %d", $trackback_url, $ID ) );
}


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Changelog

Changelog
Version Description
0.71 Introduced.

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