get_to_ping( int|WP_Post $post_id )

检索需要ping的url。
Retrieve URLs that need to be pinged.

目录锚点：#返回#源码

返回（Return）

无返回值

源码（Source）

/**
 * Retrieve URLs that need to be pinged.
 *
 * @since 1.5.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $post_id Post ID
 * @return array
 */
function get_to_ping( $post_id ) {
	global $wpdb;
	$to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
	$to_ping = sanitize_trackback_urls( $to_ping );
	$to_ping = preg_split('/s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);

	/**
	 * Filter the list of URLs yet to ping for the given post.
	 *
	 * @since 2.0.0
	 *
	 * @param array $to_ping List of URLs yet to ping.
	 */
	return apply_filters( 'get_to_ping', $to_ping );
}