PHP代码加密解密（交流）

PHP代码加密解密（交流）
PHP代码如下：
<?php
$key = "This is supposed to be a secret key !!!";
function keyED($txt,$encrypt_key)
{
$encrypt_key = md5($encrypt_key);
$ctr=0;
$tmp = "";
for ($i=0;$i<strlen($txt);$i++)
{
  if ($ctr==strlen($encrypt_key)) $ctr=0;
  $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
  $ctr++;
}
return $tmp;
}
function encrypt($txt,$key)
{
srand((double)microtime()*1000000);
$encrypt_key = md5(rand(0,32000));
$ctr=0;
$tmp = "";
for ($i=0;$i<strlen($txt);$i++)
{
  if ($ctr==strlen($encrypt_key)) $ctr=0;
  $tmp.= substr($encrypt_key,$ctr,1) .
  (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
  $ctr++;
}
return keyED($tmp,$key);
}
function decrypt($txt,$key)
{
$txt = keyED($txt,$key);
$tmp = "";
for ($i=0;$i<strlen($txt);$i++)
{
  $md5 = substr($txt,$i,1);
  $i++;
  $tmp.= (substr($txt,$i,1) ^ $md5);
}
return $tmp;
}
$string = "Hello World !!!";
// encrypt $string, and store it in $enc_text
$enc_text = encrypt($string,$key);
// decrypt the encrypted text $enc_text, and store it in $dec_text
$dec_text = decrypt($enc_text,$key);
print "Original text : $string <Br>";
print "Encrypted text : $enc_text <Br>";
print "Decrypted text : $dec_text <Br>";
?>
文章出处：www.now.cn/vhost

虚拟主机- 虚拟主机全国五强,专业的虚拟主机服务提供商,ASP虚拟主机 ...时代网(时代互联)是中国首家JAVA虚拟主机提供商和ASP.NET虚拟主机服务提供商,全面支持：JSP虚拟 ... NET虚拟主机,PERL虚拟主机,JAVA 虚拟主机.近50项全系列网站管理工具。

主机，虚拟主机，java虚拟主机，java空间