About PHP binary stream bit-wise low in front algorithm (detailed) _php tutorial

Copy CodeThe code is as follows:
/******************************************************
* Bit-wise low in front algorithm
* @param $x
* @return int
*/
function reverse ($x)
{
$result = 0;
for ($i = 0; $i < 8; $i + +)
{
$result = ($result << 1) + (1 & ($x >> $i));
}
return $result & 0xFF;
}

Call Show:
Copy CodeThe code is as follows:
$testData = 0xC5; Binary: 1100 0101
$testRet = reverse ($testData);
Echo $testRet; The output value is 163 and the binary is 1010 0011

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