PHP警报消息

本文介绍了PHP警报消息的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我知道每个人都要说的第一件事是，这已经发布了几百次;然而，我已经尝试了所有不同的方法，人们建议仍然没有运气...我试图得到一个警告消息弹出如果登录失败，但由于某种原因，该消息不想出现。这是我到目前为止：

I know the first thing everyone is going to say is that this has been posted hundreds of times; however, I have tried all the different methods people have suggested with still no luck... I am trying to get an alert message to popup if the login fails but for some reason the message does not want to appear. Here's what I have so far:

if($conn) { $result=sqlsrv_query($conn, "SELECT * FROM Operator WHERE Username='{$_POST['login']}'"); $pass=sqlsrv_fetch_array($result); if($pass["Password"] === $_POST['password']) { session_start(); $_SESSION['loggedin']=true; header("Location: home.php"); exit; } else { header("Location: login.php"); echo '<script type="text/javascript">'; echo 'alert("Password Invalid!")'; echo '</script>'; } } sqlsrv_close($conn);

php工作正常，但由于某种原因，我无法使javascript工作。任何想法？

The php is working fine but for some reason I can't get the javascript to work. Any ideas?

推荐答案

我想，问题在这里。

header("Location: login.php"); /* Redirect browser */

尝试删除它，或在几秒钟后重定向

try removing it, or make it redirect after a couple of seconds, like this

header( "refresh:5;url=login.php" ); //redirect after 5 seconds

或者提示用户单击进入下一页的对话框。移除标头（）tho

or you prompt a dialog for the user to click to go to next page. remove the header() tho

<script type="text/javascript"> <!-- var retVal = confirm("Login FAILED! Do you want to continue ?"); if( retVal == true ){ window.location.href = "login.php"; return true; }else{ alert("User does not want to continue!"); return false; } //--> </script>