PHP login script using session and session variables-PHP Chinese Network Q&A

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PHP login script using session and session variables

P粉726133917 2023-08-21 19:01:51

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<p>I've just finished a complete login and registration system in PHP, but my problem is that I haven't used any sessions yet. I'm new to PHP and have never used sessions before. What I want to do is that after the user registers and fills out the login form, he still stays on the same page. So one part of the page will be if the session is logged in and the other part will be otherwise (the user is not logged in so the login form is shown). Can someone tell me how to get started? </p>

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P粉5738097272023-08-22 13:18:23 2 floor

This is the simplest session code written in PHP. We used 3 files.

login.php

 window.open("home.php","_self");';            // 登录成功后重定向到home.php

        }

        else
        {
            echo "无效的用户名或密码";        
        }
}
 ?>



 登录页面   








    
  
      用户名
      
  
  
     密码

home.php




  
        主页 
  

  
 退出 "; 
?>

logout.php

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P粉3480889952023-08-22 12:03:57 1 floor

To start a session, you need to say this at the top of the page or before calling the session code

session_start();

Put user ID into session to track who is logged in

$_SESSION['user'] = $user_id;

Check if anyone is logged in

if (isset($_SESSION['user'])) {
   // 已登录
 } else {
   // 未登录
 }

Find the ID of the logged in user

$_SESSION['user']

On your page


   已登录的HTML和代码在这里
 
   未登录的HTML和代码在这里
   

                            
                                 
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