来自chatGPT的回答
function MD5($strSource, $stype) {
$obj = $strSource . '1';
$text2 = '';
if (strlen($obj) > 1) {
$bytes = utf8_encode($strSource);
$array = md5($bytes, true);
$text = '';
if ($stype == 32) {
$text = '32';
} else if ($stype == 16) {
$text = '16';
} else if ($stype == 20) {
$text = '20';
}
$left = $text;
if ($left == '16') {
for ($i = 4; $i <= 11; $i++) {
$text2 .= strtolower(bin2hex($array));
}
} else if ($left == '32') {
for ($i = 0; $i <= 15; $i++) {
$text2 .= strtolower(bin2hex($array));
}
} else {
$num = 0;
$num2 = count($array) - 1;
for ($i = $num; $i <= $num2; $i++) {
$text2 .= strtolower(bin2hex($array));
$text2 = substr($text2, 0, 20);
}
}
$text2 = $text2;
} else {
$text2 = 'rer';
}
return $text2;
}
~~~
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