'', $host );
		$host = trim( strtolower( $host ), '.' );

		return self::memoize( __FUNCTION__, [], rawurlencode( $host ) );
	}

	/**
	 * Get the path to an existing config file.
	 *
	 * @since  3.3
	 * @access protected
	 * @author Grégory Viguier
	 *
	 * @return string|bool The path to the file. False if no file is found.
	 */
	public function get_config_file_path() {
		if ( self::is_memoized( __FUNCTION__ ) ) {
			return self::get_memoized( __FUNCTION__ );
		}

		$config_dir_real_path = realpath( self::$config_dir_path ) . DIRECTORY_SEPARATOR;

		$host = $this->get_host();

		$path = str_replace( '\\', '/', strtok( $this->get_server_input( 'REQUEST_URI', '' ), '?' ) );
		$path = preg_replace( '|(?<=.)/+|', '/', $path );
		$path = explode( '%2F', preg_replace( '/^(?:%2F)*(.*?)(?:%2F)*$/', '$1', rawurlencode( $path ) ) );
		// Remove empty array values.
		$path = array_filter( $path );

		/**
		 * If path is not empty.
		 * i.e url with something like this `multisite/green/sample-page` after the host.
		 */
		if ( ! empty( $path ) ) {
			$config_file_paths = [];

			// Loop through paths and store valid config file paths matching the url current path in an array.
			foreach ( $path as $p ) {
				static $dir;

				if ( realpath( self::$config_dir_path . $host . '.' . $p . '.php' ) && 0 === stripos( realpath( self::$config_dir_path . $host . '.' . $p . '.php' ), $config_dir_real_path ) ) {
					$config_file_paths[] = self::$config_dir_path . $host . '.' . $p . '.php';
				}

				if ( realpath( self::$config_dir_path . $host . '.' . $dir . $p . '.php' ) && 0 === stripos( realpath( self::$config_dir_path . $host . '.' . $dir . $p . '.php' ), $config_dir_real_path ) ) {
					$config_file_paths[] = self::$config_dir_path . $host . '.' . $dir . $p . '.php';
				}

				$dir .= $p . '.';
			}

			// Reverse array order so that subsite config file paths can come first.
			$config_file_paths = array_reverse( $config_file_paths );

			/**
			 * Check if there was a matching config file for the url current path
			 * and return the first
			 */
			if ( ! empty( $config_file_paths ) ) {
				return self::memoize(
					__FUNCTION__,
					[],
					[
						'success' => true,
						'path'    => $config_file_paths[0],
					]
				);
			}
		}

		if ( realpath( self::$config_dir_path . $host . '.php' ) && 0 === stripos( realpath( self::$config_dir_path . $host . '.php' ), $config_dir_real_path ) ) {
			$config_file_path = self::$config_dir_path . $host . '.php';
			return self::memoize(
				__FUNCTION__,
				[],
				[
					'success' => true,
					'path'    => $config_file_path,
				]
			);
		}

		return self::memoize(
			__FUNCTION__,
			[],
			[
				'success' => false,
				'path'    => self::$config_dir_path . $host . implode( '/', $path ) . '.php',
			]
		);
	}

	/** ----------------------------------------------------------------------------------------- */
	/** SPECIFIC CONFIG GETTERS ================================================================= */
	/** ----------------------------------------------------------------------------------------- */

	/**
	 * Get rejected cookies as a regex pattern.
	 * `#` is used as pattern delimiter.
	 *
	 * @since  3.3
	 * @access protected
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_rejected_cookies() {
		$rejected_cookies = $this->get_config( 'cache_reject_cookies' );

		if ( '' === $rejected_cookies ) {
			return $rejected_cookies;
		}

		return '#' . $rejected_cookies . '#';
	}

	/**
	 * Get mandatory cookies as a regex pattern.
	 * `#` is used as pattern delimiter.
	 *
	 * @since  3.3
	 * @access protected
	 * @author Grégory Viguier
	 *
	 * @return string
	 */
	public function get_mandatory_cookies() {
		$mandatory_cookies = $this->get_config( 'cache_mandatory_cookies' );

		if ( '' === $mandatory_cookies ) {
			return $mandatory_cookies;
		}

		return '#' . $mandatory_cookies . '#';
	}
}