er( $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 ) ) );

		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 ) ) {
				$config_file_path = self::$config_dir_path . $host . '.' . $p . '.php';
				return self::memoize(
					__FUNCTION__,
					[],
					[
						'success' => true,
						'path'    => $config_file_path,
					]
				);
			}

			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 ) ) {
				$config_file_path = self::$config_dir_path . $host . '.' . $dir . $p . '.php';
				return self::memoize(
					__FUNCTION__,
					[],
					[
						'success' => true,
						'path'    => $config_file_path,
					]
				);
			}

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

		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 . '#';
	}

}