php实现的简单检验登陆类

本文实例讲述了php实现的简单检验登陆类。分享给大家供大家参考。具体如下：

    <?php
    class checklogin
    {
      var $name;
      var $pwd;
      function __construct($username,$password)
      {
       $this->name=$username;
       $this->pwd=$password;
      }
      function checkinput()
      {
       global $db;
       $sql="select * from tb_manager where name='$this->name' and pwd='$this->pwd'";
       $res=$db->query($sql);
       $info=$db->fetch_array($res); 
       if($info['name']==$this->name and $info['pwd']==$this->pwd)
       {
         $_SESSION[admin_name]=$info[name];
         $_SESSION[pwd]=$info[pwd];
         echo "<script>alert('登录成功！);window.location.href='index.php';</script>";
       }
       else
       {
         echo "<script language='javascript'>alert('登录失败！');history.back();</script>";
         exit;
       }
      }
    }
    ?>

希望本文所述对大家的php程序设计有所帮助。