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tp框架的ajax验证用户姓名的比较

数据库设计随意设计吧 反正就是用户可以存入就可以了!

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正文tp后台方法简化:

 //用户验证
   function checknm($name){
       $info = D('user')->where("user_name ='$name'")->find();
       //dump($info);die;
       $flag = '';
       if($info){
          echo 1;
         
       }else{
          echo 2;
        
       }
   }

后台返回1和2

前端ajax部分 用data接收1和2的状态

当然data的接收 主要看你后台传的是什么格式的数据类型了!这个大家可以百度ajax了!


                    
                        
                                                                                                                                                                                                                                                function checkname(){                                         var name = document.getElementById('User_username').value;                                                                              $.get('/tpTest/index.php/User/checknm',{name:name},function(data){                                             //alert(name);                                          if(data == 1){                                            var nm = document.getElementById('span1');                                            nm.innerHTML='用户名存在';                                            nm.className ="msg2";                                          }                                          if(data == 2){                                          var nm = document.getElementById('span1');                                            nm.innerHTML='用户可以使用';                                            nm.className ="msg";                                                                                    }                                         })                                                                 }                                                                                                                                                                                                 用户名                                                                                                                                                                                                                                                                                                                      
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