diff --git a/authzgroups.php b/authzgroups.php
index 50c80b7..0439a2a 100644
--- a/authzgroups.php
+++ b/authzgroups.php
@@ -681,6 +681,30 @@ class authzgroups
     return $res;
   }
 
+  /** Return an array with all the groups where the user is in and in the module
+    */
+  public function groupmemberReadUserByID ($module, $idgroupmember)
+  {
+    if ($this->dbGroupMember == null)
+      throw new Exception (dgettext ("domframework",
+                                     "DB for GroupMember is not connected"),
+                                     500);
+    $idgrouptmps = $this->groupRead ($module);
+    // Create an array with idgroup=>group
+    $idgroups = array ();
+    foreach ($idgrouptmps as $val)
+      $idgroups[$val["idgroup"]] = $val["group"];
+    $select = array ();
+    $select[] = array ("idgroupmember", $idgroupmember);
+    $idgroupmembers = $this->dbGroupMember->read ($select);
+    $res = array ();
+    foreach ($idgroupmembers as $idmembers)
+    {
+      $res[$idmembers["idgroup"]] = $idgroups[$idmembers["idgroup"]];
+    }
+    return $res;
+  }
+
   /** Return an array with all the available users in the group and in the
       module */
   public function groupmemberReadGroup ($module, $group)