代码如下(求大神指导):
if($id == null){
$Verify =new \Think\Verify();
$code=I('post.verify');
if(!$Verify->check($code)){
$this->ajaxReturn(array(
'data' => '',
'status' => -1,
'msg' => '验证码错误'
));
}
if($User->add()){
$this->ajaxReturn(array(
'data' => '',
'status' => 0,
'msg' => '注册成功'
));
}
else{
$this->ajaxReturn(array(
'data' =>'',
'status' => -1,
'msg' => '注册失败'
));

}
}
else{
$this->ajaxReturn(array(
'data' =>'',
'status' => -1,
'msg' =>"用户名已存在"
));
}