一段php加密解密的代码参考，希望能够帮到有这方便需求的朋友。 ?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($t
