警告：session_destroy（）：试图破坏未初始化的会话[使用的session_start
我知道我的代码非常入门，因为我刚开始使用php。很抱歉开始
我已经读过其他有关的问题和解答
警告：session_destroy（）：试图破坏未初始化的会话
刚才提到的所有答案，我都需要在使用前使用session_start（）
session_destroy（）;
但是他们并没有解释为什么即使我已经使用过session_start（） 我也只是尝试登录而出现此警告的原因，然后出现仪表板页面，用户可以单击注销按钮来注销
整个应用程序运行正常，唯一的问题是当我单击dashboard.php中的注销按钮时，它会转到注销页面并显示上面提到的警告
login.php
<?php
session_start();
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Login Page</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div class="header">
<h1 align="center">Login</h1>
</div>
orm action="" method="post">
<table align="center">
<tr>
<td align="right"><input type="email" name="email" placeholder="Email" required></td>
<td class="s1">*</td>
</tr>
<tr>
<td align="right"><input type="password" name="pass" placeholder="Password" pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,12}" title="Must contain at least one number and one uppercase and lowercase letter, and at least 8 or more characters" required></td>
<td class="s1">*</td>
</tr>
<tr>
<td align="right"><input type="submit" value="Login"><td>
</tr>
</table>
<p align="center"><strong>Or</strong></p>
<p align="center">Create New acount <strong><input type="button" value="Sign Up" onclick="location.href='sign_up.php'"></strong></p>
<br>
<br>
<br>
<br>
<br>
<div class="footer">
<p><span class="s1">*</span> indicates mandatory feild<p>
</div>
</body>
</html>
<?php
require 'connection.php'; // connection
if($_SERVER['REQUEST_METHOD'] === 'POST')
{
$email = $_POST['email'];
$pass = $_POST['pass'];
// getting username from database and storing into session variable
/// $sql =mysqli_query($conn,"SELECT name FROM users WHERE email='$email'");
$sql1 = mysqli_fetch_assoc($sql);
$user_name = $sql1['name'];
// setting session variables
$_SESSION['user_name']= $cookie_name;
$_SESSION['timeout']=time();
// check email exists or not
$query=mysqli_query($conn,"SELECT email FROM users WHERE email='$email'");
if(mysqli_num_rows($query) > 0)
MMMHUHU1回答
-
qq_遁去的一_1
你跑了session_destroy()两次！这会导致您的错误。if语句中的代码在initial之后运行session_destroy()。您也正在针对进行session_unset()同样的修复。这是导致问题的代码（第二个session_destroy()返回false）：session_destroy(); // returns trueif(!session_destroy()) // returns false, because the session is already destroyed.{ echo "session not destroyed"; // this gets ran}else { echo "session destroyed";}您可以更改为此，以解决您的错误。if(!session_destroy()){ echo "session not destroyed";}else { echo "session destroyed";}
随时随地看视频慕课网APP
PHP