这段PHP代码表示什么加密啊?

Question

login.php
<? 
require("common_header.inc.php");
$email =Encrypt(trim($_REQUEST['usernames']));
$password =trim($_REQUEST['passwords']);
if($_REQUEST['username']<>""){
$email =Encrypt(trim($_REQUEST['username']));
$email2 =Encrypt(strtolower(trim($_REQUEST['username'])));
$email3= trim($_REQUEST['username']);
$password =trim($_REQUEST['password']);
$newspassword=md5($password);
}
$sel_sql = "select * from sel_user where u_email='$email' or u_email='$email2' or u_email='$email3' ";
$sel_exec = mysql_query($sel_sql) or die(DEFAULT_ERROR_3);
$sel_number= mysql_num_rows($sel_exec);
if($sel_number>0)
{
$u_password = mysql_result($sel_exec,0,"u_password");
if(md5($password) == $u_password)
{
$u_id = mysql_result($sel_exec,0,"u_id");
$u_name = mysql_result($sel_exec,0,"u_name");
$u_fname = mysql_result($sel_exec,0,"u_fname");
$u_lname = mysql_result($sel_exec,0,"u_lname");
$u_email = mysql_result($sel_exec,0,"u_email");
$u_charge = mysql_result($sel_exec,0,"u_charge");
$newusercode=mysql_result($sel_exec,0,"newusercode"); 
$newuserbs=mysql_result($sel_exec,0,"newuserbs"); 
$menber_seesion=mysql_result($sel_exec,0,"merry_coins"); 
$session_user_id = $u_id;
$session_user_name = $u_name;
$session_user_fname = $u_fname;
$session_user_lname = $u_lname;
$session_user_email = $u_email;
$session_user_charge = $u_charge;$_SESSION["session_user_id"]=$session_user_id;$_SESSION["session_user_name"]=$session_user_name;$_SESSION["session_user_fname"]=$session_user_fname;$_SESSION["session_user_lname"]=$session_user_lname;
$_SESSION["session_user_email"]=$session_user_email;
$_SESSION["session_user_charge"]=$session_user_charge;
$_SESSION["newusercode"] = $newusercode;
$_SESSION["newuserbs"] = $newuserbs;
$_SESSION["menber_session"] = $menber_seesion;
session_register("session_user_id");
//session_register("session_user_name");
//session_register("$session_user_fname");
//session_register("session_user_lname");
//session_register("session_user_email");
//session_register("session_user_charge");if($urls<>""){
$reurls=$urls;
}else{
$reurls=$_SESSION['url'];}
?>
<script language="javascript">var url="<?=$reurls?>";
if(url==''){
window.location.href=document.referrer;}
else
{ 
window.location.href="<?=$reurls?>";}
</script>
<?
echo DEFAULT_MESSAGE_1;
die(DEFAULT_MESSAGE_19);
}else{
?>
<script language="javascript">
alert("<?=DEFAULT_ERROR_4?>");
window.location.href=document.referrer;
</script>
<?
echo DEFAULT_ERROR_4;
die(DEFAULT_MESSAGE_19);
} 
}else{
?>
<script language="javascript">
alert("<?=DEFAULT_ERROR_5?>");
window.location.href=document.referrer;
</script>
<?
echo DEFAULT_ERROR_5;
die(DEFAULT_MESSAGE_19);
}?>
password是md5加密的 email不知道是用什么加密的?怎么解密呢?我去数据库看了一下数据 是这种形式的.u_name:petlord2
passwd:689dfb28ace7147809d052316379a599
email:143,117,144,85,66,122,68,124,244,102,123,33,114,74,100,62,80,17,35,48,90请教了 EMAIL地址怎么解密?
 

Answer 1

$email =Encrypt(trim($_REQUEST['usernames'])); 
email 加密，是不是用的他自己的加密方式。我要做加密，一般写有自己的加密，不单纯用sha1或md5,比如我用：function pwd($str)
{
return md5(md5('[email protected]'.md5($str).md5($str)));
}