md5 16位二进制与32位字符串相互转换示例

复制代码 代码如下:
<?php

$str = "test";
$cm = md5($str);
$bm = md5($str, true);

$cstr = implode(unpack("H*", $bm));
$bstr = pack("H*", $cm);

echo "str:". $str . "<br >";
echo "cm :" . $cm . "<br >";
echo "cstr:" . $cstr . "<br >";
echo "urlencode(bm)  :" . urlencode($bm) . "<br >";
echo "urlencode(bstr):" . urlencode($bstr) . "<br >";