未定义
//判断提交
if ($_GET['action'] =='register') {
if ($_POST['code'] == $_SESSION['code']) {
//接收用户数据
$_username = $_POST['username'];
echo $_username;
}
else{
alert_back();
}
}
function _alert_back(){
echo "<script type='text/javascript'>alert('验证码不正确');history.back();</script>";
exit();
}
提示 Undefined index:action