Update rexshop.php

Author: srexi

inc/plugins/rexshop.php

@@ -1227,25 +1227,28 @@ function rexshop_fetch_products($acp = false)
                     $usergroups = explode(',', ltrim(rtrim(trim($addon['value'], ' '), ','), ','));
                     if (empty($usergroups)) {
                         continue;
-                    }
-
+                    }             
+                    
+                    $usergroupIds = [];
                     foreach ($usergroups as $usergroup) {
                         $usergroupId = $usergroup;
                         if (!is_numeric($usergroup)) {
-                            $query = $db->query("SELECT * FROM `" . TABLE_PREFIX . "usergroups` WHERE LOWER(`title`)='" . strtolower($usergroup) . "' LIMIT 1");
+                            $query = $db->query("SELECT * FROM `" . TABLE_PREFIX . "usergroups` WHERE LOWER(`title`)='" . mb_strtolower($usergroup) . "' LIMIT 1");
                             if ($db->num_rows($query) > 0) {
                                 $usergroupId = (int) $db->fetch_field($query, "gid");
                             }
                         }
-
-                        if (strtolower($addon['name']) === 'onlyusergroups' || strtolower($addon['name']) === 'onlyusergroup') {
-                            if ((int) $mybb->user['usergroup'] !== (int) $usergroupId) {
-                                continue 3;
-                            }
-                        } else if (strtolower($addon['name']) === 'excludeusergroups' || strtolower($addon['name']) === 'excludeusergroup') {
-                            if ((int) $mybb->user['usergroup'] === (int) $usergroupId) {
-                                continue 3;
-                            }
+                        
+                        $usergroupIds[] = $usergroupId;
+                    }
+                    
+                    if (mb_strtolower($addon['name']) === 'onlyusergroups' || mb_strtolower($addon['name']) === 'onlyusergroup') {
+                        if (! in_array((int) $mybb->user['usergroup'], $usergroupIds) {
+                            continue 2;
+                        }
+                    } else if (mb_strtolower($addon['name']) === 'excludeusergroups' || mb_strtolower($addon['name']) === 'excludeusergroup') {
+                        if (in_array((int) $mybb->user['usergroup'], $usergroupIds)) {
+                            continue 2;
                         }
                     }
                 }