session_commit

Function name: session_commit()

Applicable version: PHP 4 >= 4.4.0, PHP 5, PHP 7

Function description: session_commit() is used to save and close the current session to ensure that session data is written to the storage medium. After calling the function, the session data will no longer be available until the session_start() function is called next time.

Syntax: bool session_commit ( void )

Example:

 // 开启会话session_start(); // 设置会话变量$_SESSION['username'] = 'John'; // 保存并关闭会话session_commit();

In the example above, we first use the session_start() function to start the session, and then set a session variable $_SESSION['username']. Finally, we call the session_commit() function to save the session data and close the session.

Note that after calling session_commit(), $_SESSION['username'] will no longer be available until the next call to session_start() is called to restart the session.

It is worth noting that if session_commit() is not called, the session data will be automatically saved at the end of script execution. However, in order to ensure that the session data is saved in time and release locked resources, it is recommended to call session_commit() manually when session data is not needed.

Return value: This function returns a Boolean value indicating whether the session is successfully saved and closed. Return true if the session is saved successfully and closed; otherwise return false.

Notes:

1. This function is only available when session support is enabled.
2. The session_commit() function must be called in session state, i.e. after the session_start() is called, but before the script ends.
3. After calling session_commit(), session data will no longer be available until the next call to session_start() is called to restart the session.