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

5734	 *5735	 * @since 3.4.05736	 *5737	 * @param string $urls_to_ping Sanitized space or carriage return separated URLs.5738	 * @param string $to_ping      Space or carriage return separated URLs before sanitization.5739	 */5740	return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );5741}5742 5743/**5744 * Adds slashes to a string or recursively adds slashes to strings within an array.5745 *5746 * This should be used when preparing data for core API that expects slashed data.