This field contains the component part numbers, description of room and additional text (which is not assigned), the fields in the same group may only occur once the sample code:

$roomDescDef=array(1=>'Room',3=>'Balcony',7=>'Double',16=>'air conditioning',26=>'Shower',45=>'WC'/*,the rest of them ...*/); // for example, the array contains only values ​​used 
$xRoomDesc="1,3,7,16,26,45,/french balcony"; // sample contents of the field
$opis=array();
list($ids,$adtdesc)=explode("/",$xRoomDesc,2);
foreach(explode(',',$ids) as $id)
  if (isset($roomDescDef[$id]))
    $opis[]=$roomDescDef[$id];
$pelnyopis=implode(',',$opis).(!empty($adtdesc)?"($adtdesc)":"");

which should give us: “room, balcony, double room, air conditioning, shower, wc, (french balcony)”

A condition is to give a comma separated list of id.