public function isNegative( $binaryString ){
        $firstBit = $binaryString[0];
        $negativeFlag = $firstBit & "\x80";
        $isNegative = ord($negativeFlag) == 128;
        return $isNegative;
    }
public function isNegative( $binaryString ){
        $firstBit = $binaryString[0];
        $negativeFlag = $firstBit & "\x80";
        $isNegative = ord($negativeFlag) == 128;
        return $isNegative;
    }
public function isNegative ( $ binaryString ) { $ firstBit = $ binaryString [ 0 ] ; $ negativeFlag = $ firstBit & "\x80" ; $ isNegative = ord ( $ negativeFlag ) == 128 ; return $ isNegative ; }
Public for testing purposes
@param type $binaryString
@return type
Public for testing purposes