``` <input type="text" name="info['username']"><br><br> $data = input('post.')['info']; $_REQUEST['username']; ``` ``` <form method="post" enctype="multipart/form-data" onsubmit="return check()"> <input type="submit" class="submit" value="立即注册" onclick="sub()"> </form> function check(){ $username = $('#username').val(); if ($username=='') { webToast("恭喜您，修改成功恭喜您，修改成功恭喜您修改成功恭喜 您","middle",2000); return false; } } ```