PHP代碼加密解密（交流）
【在線QQ討論群】
PHP代碼如下：
<?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>";
?>
文章出處： www.now.cn/vhost

虛擬主機(jī)- 虛擬主機(jī)全國五強(qiáng),專業(yè)的虛擬主機(jī)服務(wù)提供商,ASP虛擬主..
時(shí)代網(wǎng)(時(shí)代互聯(lián))是中國首家JAVA虛擬主機(jī)提供商和ASP.NET虛擬主機(jī)服務(wù)提供商,全面支持:JSP虛擬主機(jī),PHP虛擬主機(jī),ASP虛擬主機(jī),ASP.NET虛擬主機(jī),PERL虛擬主機(jī),JAVA 虛擬主機(jī).近50項(xiàng)全系列網(wǎng)站管理工具。機(jī)位于電信,網(wǎng)通,香港超級(jí)數(shù)據(jù)港,20G... www.now.cn/vhost