original_string: function getBacktrace($frame = null)
      {
          if (defined('PEAR_IGNORE_BACKTRACE')) {
              return null;
          }
          if ($frame === null) {
              return $this->backtrace;
          }
          return $this->backtrace[$frame];
      }
code: function getBacktrace($frame = null)
      {
          if (defined('PEAR_IGNORE_BACKTRACE')) {
              return null;
          }
          if ($frame === null) {
              return $this->backtrace;
          }
          return $this->backtrace[$frame];
      }
code_tokens: function getBacktrace ( $ frame = null ) { if ( defined ( 'PEAR_IGNORE_BACKTRACE' ) ) { return null ; } if ( $ frame === null ) { return $ this -> backtrace ; } return $ this -> backtrace [ $ frame ] ; }
docstring: Get the call backtrace from where the error was generated.
  Supported with PHP 4.3.0 or newer.
  
  @param int $frame (optional) what frame to fetch
  @return array Backtrace, or NULL if not available.
  @access public
docstring_tokens: Get the call backtrace from where the error was generated . Supported with PHP 4 . 3 . 0 or newer .