Convert C to PHP for CRC16 Function

Question

I need help in converting C code into PHP. The following is the C Code:

static const U16 crctab16[] = { 0x0000, 0x1189, ... };

U16 GetCrc16(const U8* pData,         


        

Answer 1

I have managed to figure out the solution for this. Thanks to @nhahtdh, @Carsten, and @odiszapc who have helped.

This is the correct PHP function:

function getCrc16($pData)
{
    $hexdata = pack('H*',$pData);
    $nLength = strlen($hexdata);
    $fcs = 0xFFFF;
    $pos = 0;
    while($nLength > 0)
    {
        $fcs = ($fcs >> 8) ^ $crctab16[($fcs ^ ord($hexdata[$pos])) & 0xFF];
        $nLength--;
        $pos++;
    }
    return ~$fcs;
}

It seems that I need to ord() function in the byte format data. I have figured this out following the CRC16 example provided by @Carsten.

Thank you so much guys!