--TEST--
GH-9583: session_create_id() fails with user defined save handler that doesn't have a validateId() method
--EXTENSIONS--
session
--FILE--
<?php

class SessionHandlerTester implements \SessionHandlerInterface
{

    public function close(): bool { return true; }

    public function destroy($id): bool { return true; }

    public function gc($max_lifetime): int|false { return 1; }

    public function open($path, $name): bool { return true; }

    public function read($id): string { return ''; }

    public function write($id, $data): bool { return true; }

    //public function create_sid() { return uniqid(); }

    //public function validateId($key) { return true; }
}

$obj = new SessionHandlerTester();
ini_set('session.use_strict_mode','1');
session_set_save_handler($obj);
session_start();

echo "\nvalidateId() ".(method_exists($obj,'validateId')?('returns '.($obj->validateId(1)?'true':'false')):'is commented out');
echo "\n";
$sessionId = session_create_id();
echo "\nSession ID:".$sessionId;
echo "\n";

?>
--EXPECTF--
validateId() is commented out

Session ID:%s