Как показать индекс комнаты в соответствии с RoomCombination с использованием php в xml

Как отобразить гостиничные номера в соответствии с индексом номеров.

Я хочу отобразить гостиничный номер соответственно массиву комбинаций номеров, используя php.

 <HotelRooms>
<HotelRoom>
<RoomIndex>1</RoomIndex>
<RoomTypeName></RoomTypeName>
<Inclusion></Inclusion>
<RoomTypeCode></RoomTypeCode>
<RatePlanCode></RatePlanCode>
<RoomRate RoomFare="69.46" Currency="USD" AgentMarkUp="3.31" RoomTax="0" TotalFare="69.46"B2CRates="false">
<DayRates>
<DayRates Date="2014-03-29T00:00:00+05:30" BaseFare="69.46"/>
</DayRates>
<ExtraGuestCharges>0</ExtraGuestCharges>
<ChildCharges>0</ChildCharges>
<Discount>0</Discount>
<OtherCharges>0</OtherCharges>
<ServiceTax>0</ServiceTax>
</RoomRate>
<RoomAdditionalInfo MaxAdult="2" MaxChild="1">
<Description></Description>
<ImageURLs>
<URL></URL>
</ImageURLs>
<Amenities>
<Amenity>Coffee and Tea maker</Amenity>
<Amenity>Color television</Amenity>
<Amenity>Free Car</Amenity>
</Amenities>
</RoomAdditionalInfo>
</HotelRoom>
<HotelRoom>
<RoomIndex>2</RoomIndex>
<RoomTypeName>Single Room Standard Twin</RoomTypeName>
<Inclusion>None</Inclusion>
<RoomTypeCode>SB|0|0||001:NOV:2611:S3165:3514:13645|2</RoomTypeCode>
<RatePlanCode>001:NOV:2611:S3165:3514:13645|NOV|SB</RatePlanCode>
<RoomRate RoomFare="69.46" Currency="USD" AgentMarkUp="3.31" RoomTax="0" TotalFare="69.46"B2CRates="false">
<DayRates>
<DayRates Date="2014-03-29T00:00:00+05:30" BaseFare="69.46"/>
</DayRates>
Page 47 of 67
TBOHolidays
Hotel API 7.0
Revision : 00
<ExtraGuestCharges>0</ExtraGuestCharges>
<ChildCharges>0</ChildCharges>
<Discount>0</Discount>
<OtherCharges>0</OtherCharges>
<ServiceTax>0</ServiceTax>
</RoomRate>
<RoomAdditionalInfo SmokingPref="NonSmoking" MaxOccupancy="2">
<Description>Private bathroom with a deep soaking bathtub &lt;br /&gt;Non-Smoking&lt;br /&gt;</Description>
</RoomAdditionalInfo>
</HotelRoom>
<HotelRoom>
<RoomIndex>3</RoomIndex>
<RoomTypeName>Double Room Standard Triple with Child (5,13)</RoomTypeName>
<Inclusion>None</Inclusion>
<RoomTypeCode>DB|0|1|5,13|001:NOV:2611:S3165:3514:13635|3</RoomTypeCode>
<RatePlanCode>001:NOV:2611:S3165:3514:13635|NOV|DB</RatePlanCode>
<RoomRate RoomFare="97.57" Currency="USD" AgentMarkUp="4.65" RoomTax="0" TotalFare="97.57"B2CRates="false">
<DayRates>
<DayRates Date="2014-03-29T00:00:00+05:30" BaseFare="97.57"/>
</DayRates>
<ExtraGuestCharges>0</ExtraGuestCharges>
<ChildCharges>0</ChildCharges>
<Discount>0</Discount>
<OtherCharges>0</OtherCharges>
<ServiceTax>0</ServiceTax>
</RoomRate>
</HotelRoom>
<HotelRoom>
<RoomIndex>4</RoomIndex>
<RoomTypeName>Single Room Standard Triple</RoomTypeName>
<Inclusion>None</Inclusion>
<RoomTypeCode>SB|0|0||001:NOV:2611:S3165:3514:13635|4</RoomTypeCode>
<RatePlanCode>001:NOV:2611:S3165:3514:13635|NOV|SB</RatePlanCode>
<RoomRate RoomFare="97.57" Currency="USD" AgentMarkUp="4.65" RoomTax="0" TotalFare="97.57"B2CRates="false">
<DayRates>
<DayRates Date="2014-03-29T00:00:00+05:30" BaseFare="97.57"/>
</DayRates>
<ExtraGuestCharges>0</ExtraGuestCharges>
<ChildCharges>0</ChildCharges>
<Discount>0</Discount>
<OtherCharges>0</OtherCharges>
<ServiceTax>0</ServiceTax>
</RoomRate>
<RoomAdditionalInfo SmokingPref="NonSmoking" MaxOccupancy="2">
<Description>Private ba`enter code here`throom with a deep soaking bathtub &lt;br /&gt;Non-Smoking&lt;br /&gt;</Description>
</RoomAdditionalInfo>
</HotelRoom>
</HotelRooms>
<OptionsForBooking>
<FixedFormat>true</FixedFormat>
<RoomCombination>
<RoomIndex>1</RoomIndex>
<RoomIndex>2</RoomIndex>
</RoomCombination>
<RoomCombination>
<RoomIndex>3</RoomIndex>
<RoomIndex>4</RoomIndex>
</RoomCombination>
</OptionsForBooking>

Любая помощь приветствуется.