twzBG5Dq

1$sign = ""; 
2
3foreach ($request->getParams() as $key => $param) { 
4
5    if ($key == 'hash' || $key == 'sign') continue; 
6
7    $sign .=$param; 
8
9} 
10
11$secret = 'SECRET_KEY'; 
12
13$sig = $secret ? hash_hmac('sha256', $sign, $secret) : "";