PHP登录（ajax提交数据和后台校验）实例分享


            1.前台ajax数据提交





<form id="login_form" action="" method="POST">

  <div class="login_frame" style="position:relative";>

    <div class="login_gl" style="margin-top:35px;">

      <span class="login_wz" >后台管理系统</span>

    </div>

    <div class="login_user">

      <input id="username" name="username" type="text" placeholder="请输入您的用户名" value="" style="width:100%;height:32px;border-style:none;font-size:16px;color:#959595;"/>

    </div>

    <div class="login_user">

      <input id="password" name="password" type="password" placeholder="请输入您的密码" value="" style="width:100%;height:32px;border-style:none;font-size:16px;color:#959595;"/>

    </div>

    <div id="login_btn" class="login_log">

      <span style="font-size:16px;">登录</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("请输入用户名");

      return false;

    }else if(password == ""){

      alert("请输入密码");

      return false;

    }

    //ajax去服务器端校验

    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("登录失败，请重试!");

        }

      }

    });

});  

</script>





2.后台校验：





* */

  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){

        //登录时间和登录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;//登录成功

      }

    }else{

      $return=2;//登录失败

    }

    $this->ajaxReturn($return);

  }







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