Store a user's information, change the user session settings, and all pages can be used. This article mainly shares with you the principles of PHP Session development and detailed usage instructions. I hope it can help you.
PHP Session variable
Open the program, make some changes, then save and exit. It's just a session. The server can know who is operating through the session.
Working mechanism: Create a uid for the visitor, store variables according to this uid, the uid is stored in a cookie, or URL transmission.
Related topic recommendations: php session (including pictures, texts, videos, cases)
Use PHP Session
Start the session before storing user information in the session
Note: The session_start() function must be located before the tag:
<?php session_start(); ?><html><body></body></html>
Register the user session with the server , convenient for saving user information, and assigning a uid to the user session
Storage Session variable
To store and obtain session, use $_SESSION
<?phpsession_start();// 存储 session 数据if(isset($_SESSION['views']))
{ $_SESSION['views']=$_SESSION['views']+1;
}else{ $_SESSION['views']=9999;
}?><html><head><meta charset="utf-8"></head><body><?php// 检索 session 数据echo "浏览量：". $_SESSION['views'];?></body></html>Output "Views: 9999"
Destroy Session
Which unset() or session_destroy() function is used to destroy
<?phpsession_start();if(isset($_SESSION['views']))
{ //释放指定的 session 变量
unset($_SESSION['views']);
}//彻底销毁 sessionsession_destroy();?>Function: Store a user's information, change user session settings, and can be used on all pages.
PHP Session variable
Open the program, make some changes, then save and exit. It's just a session. The server can know who is operating through the session.
Working mechanism: Create a uid for the visitor, store variables according to this uid, the uid is stored in a cookie, or URL transmission.
Use PHP Session
Save user information before the session and start the session
Note: The session_start() function must be located before the tag:
<?php session_start(); ?><html><body></body></html>
Register the user session with the server to facilitate saving user information, and assign a uid to the user session
Storage Session variable
Store and obtain session using $ _SESSION
<?phpsession_start();// 存储 session 数据if(isset($_SESSION['views']))
{ $_SESSION['views']=$_SESSION['views']+1;
}else{ $_SESSION['views']=9999;
}?><html><head><meta charset="utf-8"></head><body><?php// 检索 session 数据echo "浏览量：". $_SESSION['views'];?></body></html>Output "Views: 9999"
Destroy Session
Which one to useunset() or session_destroy() Function destruction
<?phpsession_start();if(isset($_SESSION['views']))
{ //释放指定的 session 变量
unset($_SESSION['views']);
}//彻底销毁 sessionsession_destroy();?>Related recommendations:
PHP Session principle analysis and use
Analysis of SESSION principle in PHP and large websites Application Notes
Session Principle Brief Description_PHP Tutorial
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