登錄（ajax提交數據和後台校驗），ajax校驗

登錄（ajax提交數據和後台校驗），ajax校驗

1.前台ajax數據提交

<form id="login_form" action="" method="POST">
    <div class="login_frame" ;>
        <div class="login_gl" >
            <span class="login_wz" >後台管理系統</span>
        </div>

        <div class="login_user">
            <input id="username" name="username" type="text" placeholder="請輸入您的用戶名" value=""  />
        </div>

        <div class="login_user">
            <input id="password" name="password" type="password" placeholder="請輸入您的密碼" value=""  />
        </div>

        <div id="login_btn" class="login_log">
            <span >登錄</span>
        </div>
    </div>
   </form>
</div>
<script type="text/javascript">
    $("#login_btn").click(function(){
       var username = $.trim($("#username").val());
       var password = $.trim($("#password").val());
        if(username == ""){
            alert("請輸入用戶名");
            return false;
        }else if(password == ""){
            alert("請輸入密碼");
            return false;
        }
        //ajax去服務器端校驗
        var data= {username:username,password:password};
        
        $.ajax({
            type:"POST",
            url:"__CONTROLLER__/check_login",
            data:data,
            dataType:'json',
            success:function(msg){
                //alert(msg);
                if(msg==1){
                      window.location.href = "{:U('Index/personal')}";   
                }else{
                    alert("登錄失敗，請重試!");
                }
            }
        });
});    
</script>

2.後台校驗：

  * */
    public function check_login(){
        $password=I('param.password');
        $username=I('param.username');
        $data["name"]=$username;
        $user=M('systemuser');
        $list=$user->where($data)->find();
        $return=0;
        if($list!=""){
            if($list['password']==md5($password) && $list['status'] == 1){
                //登錄時間和登錄IP
                $public = new PublicController();
                $lastlogonip=$public->ip_address();
                            
                $time=$time=date("Y-m-d H:i:s", time());
                $where=array('id'=>$list['id']);
                
                $user->where($where)->save(array('lastlogonip'=>$lastlogonip,'lastlogontime'=>$time));
                $this->login($list);
                $return=1;//登錄成功
            }
        }else{
            $return=2;//登錄失敗
        }
        $this->ajaxReturn($return);
    }

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