original_string: protected function _decipher(&$Xl, &$Xr)
      {
          if ($Xl < 0) {
              $Xl += 4294967296;
          }
          if ($Xr < 0) {
              $Xr += 4294967296;
          }
  
          for ($i = 17; $i > 1; --$i) {
              $temp = $Xl ^ $this->_P[$i];
              if ($temp < 0) {
                  $temp += 4294967296;
              }
  
              $Xl = fmod((fmod($this->_S[0][($temp >> 24) & 255]
                               + $this->_S[1][($temp >> 16) & 255], 4294967296)
                          ^ $this->_S[2][($temp >> 8) & 255])
                         + $this->_S[3][$temp & 255], 4294967296) ^ $Xr;
              $Xr = $temp;
          }
  
          $Xr = $this->_binxor($Xl, $this->_P[1]);
          $Xl = $this->_binxor($temp, $this->_P[0]);
      }
code: protected function _decipher(&$Xl, &$Xr)
      {
          if ($Xl < 0) {
              $Xl += 4294967296;
          }
          if ($Xr < 0) {
              $Xr += 4294967296;
          }
  
          for ($i = 17; $i > 1; --$i) {
              $temp = $Xl ^ $this->_P[$i];
              if ($temp < 0) {
                  $temp += 4294967296;
              }
  
              $Xl = fmod((fmod($this->_S[0][($temp >> 24) & 255]
                               + $this->_S[1][($temp >> 16) & 255], 4294967296)
                          ^ $this->_S[2][($temp >> 8) & 255])
                         + $this->_S[3][$temp & 255], 4294967296) ^ $Xr;
              $Xr = $temp;
          }
  
          $Xr = $this->_binxor($Xl, $this->_P[1]);
          $Xl = $this->_binxor($temp, $this->_P[0]);
      }
code_tokens: protected function _decipher ( & $ Xl , & $ Xr ) { if ( $ Xl < 0 ) { $ Xl += 4294967296 ; } if ( $ Xr < 0 ) { $ Xr += 4294967296 ; } for ( $ i = 17 ; $ i > 1 ; -- $ i ) { $ temp = $ Xl ^ $ this -> _P [ $ i ] ; if ( $ temp < 0 ) { $ temp += 4294967296 ; } $ Xl = fmod ( ( fmod ( $ this -> _S [ 0 ] [ ( $ temp >> 24 ) & 255 ] + $ this -> _S [ 1 ] [ ( $ temp >> 16 ) & 255 ] , 4294967296 ) ^ $ this -> _S [ 2 ] [ ( $ temp >> 8 ) & 255 ] ) + $ this -> _S [ 3 ] [ $ temp & 255 ] , 4294967296 ) ^ $ Xr ; $ Xr = $ temp ; } $ Xr = $ this -> _binxor ( $ Xl , $ this -> _P [ 1 ] ) ; $ Xl = $ this -> _binxor ( $ temp , $ this -> _P [ 0 ] ) ; }
docstring: Deciphers a single 64-bit block.
  
  @param int &$Xl
  @param int &$Xr
docstring_tokens: Deciphers a single 64 - bit block .