澳门新葡萄京官网首页一段php加密解密的代码

?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;$istrlen($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 ($i=0;$istrlen($txt);$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;$istrlen($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/n;print
Encrypted text : $enc_text Br/n;print Decrypted text : $dec_text
Br/n;?

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