Level 56
Use PHP's parse_url and parse_str functions:
$url = 'https://example.com?l=en&d=1234&s=abcd';
$query = parse_url($url)['query'] ?? '';
parse_str($query, $parameters);
$languageCode = $parameters['l'] ?? '';
$deviceId = $parameters['d'] ?? '';
$sessionId = $parameters['s'] ?? '';
dd($languageCode, $deviceId, $sessionId);
References: