登录PHP会话不起作用

Question

我有一个登录表单，该表单检查输入的密码和用户名，如果正确，它将显示一条消息并使登录会话为true。 但是该会话无效。 当它将您重定向到仪表板时，您将无法访问它，会话登录的值是未知的。 因此，当您正确输入userpass时，不会在该时间创建会话，但是当您将其重定向到另一个页面时，会话将消失。

 <?PHP session_start(); // Starting session include 'config.php'; $pass = $_POST['pass']; $user = $_POST['user']; if (isset($_POST['user']) and isset($_POST['pass'])){ // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); } $result = $link->query("SELECT user FROM users2 WHERE user = '$user'"); if($result->num_rows == 0) { echo '<script type="text/javascript"> $(document).ready(function(){ demo.initChartist(); $.notify({ icon: "pe-7s-bell", message: "Username of password was wrong. Please try again." },{ type: "info", timer: 4000 }); }); </script>'; } elseif ($result->num_rows == 1){ $userpass = $link->query("SELECT pass FROM users2 WHERE user = '$user'"); $row = $userpass->fetch_assoc(); $userpasss = $row["pass"]; if ($pass == $userpasss){ echo '<script type="text/javascript"> $(document).ready(function(){ demo.initChartist(); $.notify({ icon: "pe-7s-bell", message: "You are logged in successfully! Redirecting ..." },{ type: "info", timer: 4000 }); }); </script>'; $_SESSION['login'] = "true"; $_SESSION['username'] = "$user"; echo "<meta http-equiv='refresh' content=3;URL='dashboard.php' /> "; echo $_SESSION["login"]; echo $_SESSION["username"]; // Storing session data } else { echo '<script type="text/javascript"> $(document).ready(function(){ demo.initChartist(); $.notify({ icon: "pe-7s-bell", message: "Username of password was wrong. Please try again." },{ type: "info", timer: 4000 }); }); </script>'; } } } echo $_SESSION["login"]; ?> 

代码中的问题在哪里？

谢谢

温暖的问候

Answer 1

把session_start（）; 在全局范围内访问时，此页面顶部的，因此您将获得会话值。

• 我建议您创建其他文件以进行身份​​验证。

Answer 2

您需要写出顶部session_start()所有页面

成功登录后，然后重定向到dashboard.php，需要添加第一行

<?php session_start(); echo $_SESSION['login]; ?>