Usage analysis of session method in thinkphp3.x

The example in this article describes the usage of the session method in thinkphp3.x. Share it with everyone for your reference, the details are as follows:

1. The Session method is used for Session setting, acquisition, deletion and management operations. Session is used for Session setting, retrieval, deletion and management operations

Usage session($name, $value='')

Parameter name (required): If an array is passed in, it means session initialization, if null is passed in it 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 an empty string.

The return value returns different values ​​according to the specific usage.

The session function is a diversified operation function. Passing in different parameters can complete different functional operations, including the following functions.

2. Session initialization setting

If the name parameter of the session method is passed into the array, it means session initialization setting, for example:

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

Supported incoming session parameters include:

id session_id value
name session_name Value
path session_save_path value
prefix session localized 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 setting value
cache_limiter session_cache_limiter setting value
cache_expire session_cache_expire setting value
type session hander type, you can use the handler driver extension

Session initialization setting method does not need to be called manually. It will be called automatically after the initialization of the App class. Usually the project only needs to configure the SESSION_OPTIONS parameter. The setting of the SESSION_OPTIONS parameter is an array. , the supported index names are the same as the previous session initialization parameters.

By default, the system will automatically start 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 turning off automatic startup, you can use the project’s public files or control Start the session by manually calling session_start or session('[start]') in the server.

3. Session assignment

Session assignment is relatively simple, use it directly:

session('name','value'); //设置session

is equivalent to:

$_SESSION['name'] = 'value';

4. Session value

Session value use:

$value = session('name');

Equivalent to:

$value = $_SESSION['name'];

5. Session deletion

session('name',null); // 删除name

Equivalent to:

unset($_SESSION['name']);

To delete all sessions, you can use:

session(null); // 清空当前的session

Equivalent to:

$_SESSION = array();

6. Session judgment

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

session('?name');

is used to judge whether the session value named name has been set

is equivalent to ：

isset($_SESSION['name']);

7. Session management

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

session('[操作名]');

Supported operation names include:

start start session
pause session write Enter
destroy to destroy the session
regenerate to regenerate the session id

Usage examples are as follows:

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

8. Localization support

If the prefix parameter is passed in when initializing the session settings or the SESSION_PREFIX parameter is set separately, You can enable localized session management support. After starting the localized session, all assignment, value acquisition, deletion and judgment operations will automatically support the localized session.

After localized session support is turned on, the generated session data format changes from the original $_SESSION['name'] to $_SESSION['prefix']['name']
Assuming the prefix is ​​set to think, then

assignment operation ：

session('name','value'); //设置session

Equivalent to:

$_SESSION['think']['name'] = 'value';

Value operation:

$value = session('name');

Equivalent to:

$value = $_SESSION['think']['name'];

Delete operation:

session('name',null);

Equivalent to:

unset($_SESSION['think']['name']);

Clear operation:

session(null);

Equivalent to:

unset($_SESSION['think']);

Judgment operation:

session('?name');

is equivalent to:

isset($_SESSION['think']['name']);

I hope that what this article describes will be helpful to everyone’s PHP programming based on the ThinkPHP framework.

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