PHP登錄（ajax提交數據和後台校驗）實例分享，ajax校驗

PHP登錄（ajax提交數據和後台校驗）實例分享，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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