original_string: private function _binaryXor($left, $round)
      {
          $xOr = gmp_xor(
              gmp_init($left, 2),
              gmp_init($round, 2)
          );
  
          $bin = gmp_strval($xOr, 2);
  
          return str_pad($bin, $this->sideSize, '0', STR_PAD_LEFT);
      }
code: private function _binaryXor($left, $round)
      {
          $xOr = gmp_xor(
              gmp_init($left, 2),
              gmp_init($round, 2)
          );
  
          $bin = gmp_strval($xOr, 2);
  
          return str_pad($bin, $this->sideSize, '0', STR_PAD_LEFT);
      }
code_tokens: private function _binaryXor ( $ left , $ round ) { $ xOr = gmp_xor ( gmp_init ( $ left , 2 ) , gmp_init ( $ round , 2 ) ) ; $ bin = gmp_strval ( $ xOr , 2 ) ; return str_pad ( $ bin , $ this -> sideSize , '0' , STR_PAD_LEFT ) ; }
docstring: Binary xor helper.
  
  @param string $left
  @param string $round
  
  @return string Binary string.
docstring_tokens: Binary xor helper .