original_string: public function getExitCodeText()
      {
          if (null === $exitcode = $this->getExitCode()) {
              return;
          }
  
          return isset(self::$exitCodes[$exitcode]) ? self::$exitCodes[$exitcode] : 'Unknown error';
      }
code: public function getExitCodeText()
      {
          if (null === $exitcode = $this->getExitCode()) {
              return;
          }
  
          return isset(self::$exitCodes[$exitcode]) ? self::$exitCodes[$exitcode] : 'Unknown error';
      }
code_tokens: public function getExitCodeText ( ) { if ( null === $ exitcode = $ this -> getExitCode ( ) ) { return ; } return isset ( self :: $ exitCodes [ $ exitcode ] ) ? self :: $ exitCodes [ $ exitcode ] : 'Unknown error' ; }
docstring: Returns a string representation for the exit code returned by the process.
  
  This method relies on the Unix exit code status standardization
  and might not be relevant for other operating systems.
  
  @return string|null A string representation for the exit status code, null if the Process is not terminated
  
  @see http://tldp.org/LDP/abs/html/exitcodes.html
  @see http://en.wikipedia.org/wiki/Unix_signal
docstring_tokens: Returns a string representation for the exit code returned by the process .