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Yaf_Session::has	Yaf_Session::key

Yaf_Session	Last updated: Mon, 26 Oct 2026

Yaf_Session::__isset

(Yaf >=1.0.0)

Yaf_Session::__isset — Check if a session key exists

Description

public function Yaf_Session::__isset(string $name): bool

Checks whether a session key exists. This method is an alias of Yaf_Session::has() and is called when isset() is used on a session object.

Parameters

name: The session key to check.

Return Values

Returns true if the key exists, false otherwise.

Examples

Example #1 Yaf_Session::__isset() example

<?php
$session = Yaf_Session::getInstance();
$session->start();

$session->user_id = 42;

var_dump(isset($session->user_id));
var_dump(isset($session->user_name));
?>

The above example will output something similar to:

bool(true)
bool(false)

See Also

Yaf_Session::has() - Check if a session key exists
Yaf_Session::get() - Get a session value

Yaf_Session::has	Yaf_Session::key

Yaf_Session	Last updated: Mon, 26 Oct 2026