original_string: public function validatePath($path = null)
      {
          if ($path === null) {
              $path = $this->_path;
          }
  
          // If the path is empty, then it is considered valid
          if (strlen($path) === 0) {
              return true;
          }
  
          // Determine whether the path is well-formed
          $pattern = '/^' . $this->_regex['path'] . '$/';
          $status  = @preg_match($pattern, $path);
          if ($status === false) {
              require_once 'Zend/Uri/Exception.php';
              throw new Zend_Uri_Exception('Internal error: path validation failed');
          }
  
          return (boolean) $status;
      }
code: public function validatePath($path = null)
      {
          if ($path === null) {
              $path = $this->_path;
          }
  
          // If the path is empty, then it is considered valid
          if (strlen($path) === 0) {
              return true;
          }
  
          // Determine whether the path is well-formed
          $pattern = '/^' . $this->_regex['path'] . '$/';
          $status  = @preg_match($pattern, $path);
          if ($status === false) {
              require_once 'Zend/Uri/Exception.php';
              throw new Zend_Uri_Exception('Internal error: path validation failed');
          }
  
          return (boolean) $status;
      }
code_tokens: public function validatePath ( $ path = null ) { if ( $ path === null ) { $ path = $ this -> _path ; } // If the path is empty, then it is considered valid if ( strlen ( $ path ) === 0 ) { return true ; } // Determine whether the path is well-formed $ pattern = '/^' . $ this -> _regex [ 'path' ] . '$/' ; $ status = @ preg_match ( $ pattern , $ path ) ; if ( $ status === false ) { require_once 'Zend/Uri/Exception.php' ; throw new Zend_Uri_Exception ( 'Internal error: path validation failed' ) ; } return ( boolean ) $ status ; }
docstring: Returns true if and only if the path string passes validation. If no path is passed,
  then the path contained in the instance variable is used.
  
  @param  string $path The HTTP path
  @throws Zend_Uri_Exception When path validation fails
  @return boolean
docstring_tokens: Returns true if and only if the path string passes validation . If no path is passed then the path contained in the instance variable is used .