apply_filters( 'sanitize_trackback_urls', string $urls_to_ping, string $to_ping )

5753	 *5754	 * @since 3.4.05755	 *5756	 * @param string $urls_to_ping Sanitized space or carriage return separated URLs.5757	 * @param string $to_ping      Space or carriage return separated URLs before sanitization.5758	 */5759	return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );5760}5761 5762/**5763 * Adds slashes to a string or recursively adds slashes to strings within an array.5764 *5765 * This should be used when preparing data for core API that expects slashed data.