Summary of ThinkPHP's session operation methods

This article describes in detail the various operating methods of ThinkPHP on the session. The details are as follows:

The official documentation of ThinkPHP operating the session is as follows:

start start the session
pause pause the session
clear clear the session
destroy destroy the session
get get the session value
getLocal Get the private session value
set Set the session value
setLocal Set the private session value
name Get or set the session_name
is_set Whether to set the session value
is_setLocal Whether to set the private session value
id Get or set the session_id
path Get or set the session_save_path
setExpi re Set the session expiration time
setCookieDomain Set the valid domain name
setCallback Set the callback function when the Session object is deserialized

The most commonly used operation method example code is as follows:

// 检测Session变量是否存在
Session::is_set('name');
// 给Session变 量赋值
Session::set('name','value');
// 获取Session变量
Session::get('name');

The configuration parameter code related to the Session is as follows:

'SESSION_NAME'=>'ThinkID',        // 默认Session_name
'SESSION_PATH'=>'',            // 采用默认的Session save path
'SESSION_TYPE'=>'File',            // 默认Session类型 支持 DB 和 File
'SESSION_EXPIRE'=>'300000',        // 默认Session有效期
'SESSION_TABLE'=>'think_session',    // 数据库Session方式表名
'SESSION_CALLBACK'=>'',            // 反序列化对象的回调方法

The SESSION_NAME parameter needs to be noted. If you need to not share the value of the Session between different projects, please set a different value, otherwise please keep the same default value.
If the same SESSION_NAME value is set, but you want to create a private session space based on the project, what should you do? ThinkPHP also supports private Session operations with the project as the Session space. Taking the previous common operations as an example, we change it as follows:

// 检测Session变量是否存在（当前项目有效）
Session::is_setLocal('name');
// 给Session变 量赋值（当前项目有效）
Session::setLocal('name','value');
// 获取Session变量（当前 项目有效）
Session::getLocal('name');

In this way, it will not conflict with the global Session operation and can be used in some special situations needs.
ThinkPHP supports session operations in database mode. Just set the value of SESSION_TYPE to DB. If you use database mode, make sure to set the value of SESSION_TABLE and import the following DDL into your database (taking MySQL as an example):

CREATE TABLE `think_session` (
`id` int(11) unsigned NOT NULL auto_increment,
`session_id` varchar(255) NOT NULL,
`session_expires` int(11) NOT NULL,
`session_data` blob,
PRIMARY KEY(`id`)
)

Note that the database connection in Db Session mode will use the database configuration information of the project to connect. In addition to the database method, you can also add other methods of Session saving mechanisms, such as memory method, Memcache method, etc. We only need to add the corresponding filter and use the session_set_save_handler method. For the specific method definition, refer to FilterSessionDb under Think.Util.Filter. Implementation of .class.php file.

Created a simple login judgment
After login detection, assign the Session value so that the Session value is either empty or false

$_SESSION[C('USER_AUTH_KEY')] = $logInFind['id'] ;

where [C('USER_AUTH_KEY')] is the built-in method of ThinkPHP and function classes. When the config.php file is not configured, it will be empty by default. Give it the account value extracted from $logInFind['id']. By default, it will automatically delete and disappear when the page Session is closed!
Use the following format to judge other pages

if(!isset($_SESSION[C('USER_AUTH_KEY')])) { //isset 是检测变量是否赋值!
   $this->redirect('Login','Login');　//转到注册页面
}

For more ThinkPHP related articles on session operation methods, please pay attention to the PHP Chinese website!