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Homephp教程PHP源码php-md5变换算法之大小写变换干涉

php代码

<?php 
function md5_4($data) 
{ 
//先得到密码的密文 
$data = md5($data); 
//再把密文中的英文母全部转为大写 
$data = strtoupper($data); 
//最后再进行一次MD5运算并返回 
return md5($data); 
} 
?>
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