<?phpclassCrypt{//本文来源:龙哥博客protected$key=“”;//公钥privatefunctionkeyED($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$tmp;}publicfunctionencrypt($txt,$key=”"){if(empty($key)){$key=$this->ke...