Get and/or set the current session module

# session_module_name

(PHP 4, PHP 5, PHP 7, PHP 8)

session_module_name — Get and/or set the current session module

### Description

session_module_name(?string `$module` = `null`): string|false

session_module_name() gets the name of the current session module, which is also known as session.save_handler.

### Parameters

`module`

  If `module` is specified and not `null`, that module will be used instead. Passing `"user"` to this parameter is forbidden. Instead session_set_save_handler() has to be called to set a user defined session handler.

### Return Values

Returns the name of the current session module, or `false` on failure.

### Changelog

Version | Description
--- | ---
8.0.0 | `module` is nullable now.
7.2.0 | It is now explicitly forbidden to set the module name to `"user"`. Formerly, this has been silently ignored.

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