Usage Analysis of the session method in thinkphp3.x, thinkphp3.xsession
This example describes the usage of the session method in thinkphp3.x. We will share this with you for your reference. The details are as follows:
1. The Session method is used to set, obtain, delete, and manage sessions.Sessions are used to set, obtain, delete, and manage sessions.
Usage session ($ name, $ value = '')
Parameter name (required): If an array is input, session Initialization is performed. If null is input, the current session is cleared. If it is a string, the session value is assigned, obtained, or operated.
Value (optional): The session Value to be set. If null is input, the session is deleted. The default Value is a null string.
Return values return different values based on specific usage.
The session function is a diverse operation function. You can call different parameters to complete different function operations, including the following functions.
Ii. session Initialization settings
If the name parameter of the session method is passed in an array, it indicates that the session Initialization is set. For example:
session(array('name'=>'session_id','expire'=>3600));
The following session parameters are supported:
Id session_id Value
Name session_name Value
Path session_save_path Value
Prefix session local space prefix
Expire session. gc_maxlifetime Setting Value
Domain session. cookie_domain Setting Value
Use_cookies session. use_cookies Setting Value
Use_trans_sid session. use_trans_sid
Cache_limiter session_cache_limiter
Cache_expire session_cache_expire
Type session hander type, which can be extended using the hander driver
The Session Initialization setting method does not need to be manually called. It is automatically called after the initialization of the App class ends. Generally, the project only needs to configure the SESSION_OPTIONS parameter. The SESSION_OPTIONS parameter is set as an array, the index names supported are the same as the previous session initialization parameters.
By default, the system automatically starts the session after initialization. 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 automatic start is disabled, you can start the session by manually calling session_start or session ('[start]') in the public file of the project or controller.
Iii. Assignment of sessions
Session assignment is relatively simple and can be used directly:
Session ('name', 'value'); // sets the session
Equivalent:
$_SESSION['name'] = 'value';
Iv. session values
Session value usage:
$value = session('name');
Equivalent:
$value = $_SESSION['name'];
5. delete a session
Session ('name', null); // Delete name
Equivalent:
unset($_SESSION['name']);
To delete all sessions, you can use:
Session (null); // clear the current session
Equivalent:
$_SESSION = array();
Vi. session judgment
To determine whether a session value has been set, you can use
session('?name');
Used to determine whether the session value named name has been set
Equivalent:
isset($_SESSION['name']);
VII. session management
The session method supports some simple session management operations. The usage is as follows:
Session ('[operation name]');
Supported operation names include:
Start session
Pause session writing
Destroy session
Regenerate to regenerate the session id
Example:
Session ('[pause]'); // pause session writing to the session ('[start]'); // start the session ('[destroy]'); // destroy the session ('[regenerate]'); // regenerate the session id
8. Localization support
If the prefix parameter is input during session Initialization or the SESSION_PREFIX parameter is set separately, the local session management support can be enabled. After a localized session is started, all assignment, value, deletion, and judgment operations automatically support the localized session.
After a localized session is enabled, the format of the generated session data is changed from $ _ SESSION ['name'] to $ _ SESSION ['prefix'] ['name'].
If the prefix is set to think
Assignment operation:
Session ('name', 'value'); // sets the session
Equivalent:
$_SESSION['think']['name'] = 'value';
Value operation:
$value = session('name');
Equivalent:
$value = $_SESSION['think']['name'];
Delete operation:
session('name',null);
Equivalent:
unset($_SESSION['think']['name']);
Clear operation:
session(null);
Equivalent:
unset($_SESSION['think']);
Judgment operation:
session('?name');
Equivalent:
isset($_SESSION['think']['name']);
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