get_to_ping

get_to_ping: 这个函数检索当一个文章发布时应该被ping的URL的列表。它返回一个从文章内容解析出来的URL数组。

检索需要被ping的URL。

function get_to_ping( $post ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return false;
	}

	$to_ping = sanitize_trackback_urls( $post->to_ping );
	$to_ping = preg_split( '/s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY );

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