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

5769	 *5770	 * @since 3.4.05771	 *5772	 * @param string $urls_to_ping Sanitized space or carriage return separated URLs.5773	 * @param string $to_ping      Space or carriage return separated URLs before sanitization.5774	 */5775	return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );5776}5777 5778/**5779 * Adds slashes to a string or recursively adds slashes to strings within an array.5780 *5781 * This should be used when preparing data for core API that expects slashed data.