original_string: public function getExists($varname, &$exists)
      {
          $exists = $this->_getExists($this->_vars, $varname, $value);
          return $value;
      }
code: public function getExists($varname, &$exists)
      {
          $exists = $this->_getExists($this->_vars, $varname, $value);
          return $value;
      }
code_tokens: public function getExists ( $ varname , & $ exists ) { $ exists = $ this -> _getExists ( $ this -> _vars , $ varname , $ value ) ; return $ value ; }
docstring: Given a variable name, returns the value and sets a variable indicating
  whether the value exists in the form data.
  
  @param string $varname   The form variable name.
  @param boolean &$exists  Reference to variable that will indicate
  whether $varname existed in form data.
  
  @return mixed  The form variable, or null if it doesn't exist.
docstring_tokens: Given a variable name returns the value and sets a variable indicating whether the value exists in the form data .