php用户注册与邮箱验证代码

<?php
/**
* PHP用户注册及邮箱验证
* edit: www.jb200.com
*/
require ('email.class.php');
include "dbconnect.php";
include "functions.php";
$form=check_form(@$_POST['edit']);
extract($form);

$username=@$_POST['username'];
$sql="insert into tb_user(id,username,password,mail) values(null,'".@$_POST['username']."','".@$_POST['password']."','".@$_POST['mail']."')";
mysql_query($sql);
@$sql1 = "insert into tb_user(id,username,password,status,md5name) values(null,'{$name}','{$pass}','0',md5('{$name}'))";
$res = mysql_query($sql1);
 // echo $mail;                                                                                                                                        
//echo $sql;
//$sql1="select mad5name from tb_user where username='[$name]'";
//mysql_query($sql1);
$smtpserver = "smtp.163.com";//SMTP服务器
$smtpserverport =25;//SMTP服务器端口
$smtpusermail = "*********";//发信人
@$smtpemailto = $mail;//收信人
$smtpuser = "*************"; //smtp.qq.com需要验证的
$smtppass = "**********";
$mailsubject = "激活码";
$mailbody = "<a href=http://localhost/do_reg.php?id=3>点击http://localhost/do_reg.php?id=3</a>";
$mailtype = "HTML";
$smtp = new smtp($smtpserver,$smtpserverport,true,$smtpuser,$smtppass);
$smtp->debug = false;
$smtp->sendmail($smtpemailto, $smtpusermail, $mailsubject, $mailbody, $mailtype);
 
//写入成功跳转到login.php
?>
<!--action="可以当前页面，也可以为另一个独立的php页面"-->
<form action="" method="post" id="user_register">
<table align="center" background="#cccccc">
<tr bgcolor="#CCCCCC"><td colspan="2"><div align="center">会员注册</div></td></tr>
 <tr bgcolor="#6699CC">
<td width="80"><div align="right">用户名：</div></td>
  <td width="378">  
  <input type="text" name="edit[name]" id="edit-name" size="30" />
     </td>
  </tr>
    <tr bgcolor="#CCCCCC">
   <td><div align="right">密 码：</div></td>
 
   <td>
   <input type="password" name="edit[pass]" id="edit-pass" size="30" />
   </td>
    <tr bgcolor="#6699CC">
<td><div align="right">确认密码：</div></td>
<td>
  <input type="password" name="edit[pass2]" id="edit-pass2" size="30" />
  </td>
  </tr>
  <tr bgcolor="#6699CC">
   <td width="45"><div align="right">邮箱：</div></td>
     <td>
         <input type="text" name="edit[mail]" id="edit-mail"/>
      </td>
  </tr>
 <tr bgcolor="#CCCCCC" align="center">
<td colspan="2">
<input type="submit" name="op" value="确认注册" onclick="return check_form()"/>
</td>
</tr>
</table>
</form>
<script language="javascript">
function check_form(){
 var username = document.getElementById("edit-name").value;
 var password = document.getElementById("edit-pass").value;
 var password2 = document.getElementById("edit-pass2").value;
 var mail = document.getElementById("edit-mail").value;
 var msg ="";
 if(username=="")
 {
 msg+="username is not null! n";
  alert(msg);
    }
 if(password==""){msg+="password is not null! n";
   alert(msg);
    }
 if(password!=password2){msg+="password must equal! n";
   alert(msg);
 
    }
 if(radiobutton==""){msg+="sex is not null! n";
   alert(msg);
    }
 if(mail==""){msg+="mail is not null! n";
   alert(msg);
    }
 if(msg==""){
  alert("成功了");
  window.open("login.php");
     return true;
 
    }else{
      alert("失败了");
       return false;
          }
}
</script>