One article to understand the usage of session() in TP framework

thinkPHP session() method usage:

The system provides complete support for Session management and operation, and all operations can be completed through a built-in session function.

Usage

session(name,name,value='')

Parameters

name (required): If an array is passed in, it means session initialization. Entering null means clearing the current session. If it is a string, it means session assignment, acquisition or operation.
Value (optional): The session value to be set. If null is passed in, it means deleting the session. The default is the empty string

session initialization setting

If The name parameter of the session method is passed into the array to indicate the session initialization settings, for example:

session(array('name'=>'session_id','expire'=>3600));

After initialization, the system will automatically start the session. If you do not want the system to automatically start the session, you can set SESSION_AUTO_START to false

For example:

'SESSION_AUTO_START' =>false

After turning off automatic start, you can start the session in the public file of the project or by manually calling session_start or session('[start]') in the controller.

session assignment

session('name','value'); //设置session

session value

$value = session('name');

session deletion

session('name',null); // 删除name

To delete all sessions, you can use:

session(null); // 清空当前的session

session judgment

To judge whether a session value has been set, you can use

session('?name');

Used to determine whether the session value named name has been set

session management

The session method supports some simple session management operations. The usage is as follows:

session('[操作名]');
session('[pause]'); // 暂停session写入
session('[start]'); // 启动session
session('[destroy]'); // 销毁session
session('[regenerate]'); // 重新生成session id

php comes with the function session_unset. The function is to clear (release) all SESSION (session) variables. If you need to clear a certain session variable, you should use

unset($_SESSION['var']);

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