function wp_validate_redirect( $location, $default = '' ) {
		$location = trim( $location, " \t\n\r\0\x08\x0B" );
		// browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'
		if ( substr( $location, 0, 2 ) == '//' ) {
			$location = 'http:' . $location;
		}

		// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
		$cut  = strpos( $location, '?' );
		$test = $cut ? substr( $location, 0, $cut ) : $location;

		// @-operator is used to prevent possible warnings in PHP < 5.3.3.
		$lp = @parse_url( $test );

		// Give up if malformed URL
		if ( false === $lp ) {
			return $default;
		}

		// Allow only http and https schemes. No data:, etc.
		if ( isset( $lp['scheme'] ) && ! ( 'http' == $lp['scheme'] || 'https' == $lp['scheme'] ) ) {
			return $default;
		}

		if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
			$path = '';
			if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
				$path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
				$path = wp_normalize_path( $path );
			}
			$location = '/' . ltrim( $path . '/', '/' ) . $location;
		}

		// Reject if certain components are set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
		if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
			return $default;
		}

		// Reject malformed components parse_url() can return on odd inputs.
		foreach ( array( 'user', 'pass', 'host' ) as $component ) {
			if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
				return $default;
			}
		}

		$wpp = parse_url( home_url() );

		/**
		 * Filters the whitelist of hosts to redirect to.
		 *
		 * @since 2.3.0
		 *
		 * @param array       $hosts An array of allowed hosts.
		 * @param bool|string $host  The parsed host; empty if not isset.
		 */
		$allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );

		if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts ) && $lp['host'] != strtolower( $wpp['host'] ) ) ) {
			$location = $default;
		}

		return $location;
	}