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

5835	 *5836	 * @since 3.4.05837	 *5838	 * @param string $urls_to_ping Sanitized space or carriage return separated URLs.5839	 * @param string $to_ping      Space or carriage return separated URLs before sanitization.5840	 */5841	return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );5842}5843 5844/**5845 * Adds slashes to a string or recursively adds slashes to strings within an array.5846 *5847 * This should be used when preparing data for core API that expects slashed data.