add cookie samesite

helper/http_header.php

@@ -146,6 +146,8 @@ class http_header
             $cookie .= self::COOKIE_MAX_AGE . $tsdelta;
         }
 
+        $cookie .= '; SameSite=Lax';
+
         if(!empty($path)) {
             $cookie .= self::COOKIE_PATH . $path;
         }
@@ -162,6 +164,7 @@ class http_header
             $cookie .= self::COOKIE_HTTPONLY . $httponly;
         }
 
+
         $this->mHeader->push($cookie);
 
         return true;