Joining Multiple Arrays under some Logic - php

Question

I have different arrays as follows:-
$reservations = ['reservationid' => '1', 'reservationid' => '2', 'reservationid' => '3']
$reservedrooms = ['reservationid'=> '1', 'roomno' => '1', 'reservationid' => '1', 'roomid'=>'2', 'reservationid' => '2', 'roomid'=>'3']
$guestdata = ['reservationid'=> '1', 'guestname' => 'Adam', 'reservationid' => '1', 'guestname'=>'Abraham', 'reservationid' => '2', 'guestname'=>'David']
How to join them so that they can be used as nested array with similar reservationids in CodeIgniter? I have also sent it to client side using Json and be depicted in JQuery Datatables. How to achieve it logically?
I have following code which is running on multiple tables
$this->db->from('hotelbrancheshasreservations');
$this->db->join('reservation', 'reservation.reservationid = hotelbrancheshasreservations.reservations_reservationsid');
$this->db->join('reservedrooms', 'reservedrooms.reservation_reservationid = hotelbrancheshasreservations.reservations_reservationsid');
$this->db->where( array('hotelbranches_hotelbranchesid'=>$branchid, 'status'=>$status));
$reservations = $this->db->get()->result_array();
I want result array as follows:-
$result = array (
"reservationid" => '1', 'rooms' => Array(
"roomno" => '1',
"roomno" => '2'), 'guests' => Array('guestid' => '1', 'guestname' => 'Adam', 'guestid' => '2', 'guestname' => 'David',) );

Answer 1

The following code is run in model class and then is returned back to controller. Then controller echos json object array to client side.
$this->$db->trans_start();
$this->$db->from('hotelbrancheshasreservations');
$this->$db->join('reservation', 'reservation.reservationid = hotelbrancheshasreservations.reservations_reservationsid');
$this->$db->join('reservedrooms', 'reservedrooms.reservation_reservationid = hotelbrancheshasreservations.reservations_reservationsid');
$this->$db->where( array('hotelbranches_hotelbranchesid'=>$branchid, 'status'=>$status));
$reservations = $this->$db->get()->result_array();
$this->$db->trans_complete();
return $reservations;
The above code returned following array after joining and in this solution problem is that if a reservation has more than one reserved rooms then that row is included in result set for multiple times and thats why i need to nest the reserved rooms in reservation array.
following is result set:
{"data":[{"hotelbrancheshasreservationsid":"18","hotelbranches_hotelbranchesid":"1","reservations_reservationsid":"KHAN2016Q221","status":"active","tblid":"19","reservationid":"KHAN2016Q221","startdate":"2016-05-16 11:59:00","enddate":"2016-05-21 11:59:00","duration":"","noofroom":"","reservationdate":"2016-05-22 01:41:32","guestarrivaldate":"0000-00-00 00:00:00","gestdeparturedate":"0000-00-00 00:00:00","totalreservedadults":"","totalreservedchilds":"","totalreservationcharges":"","createdby":"","createdon":"0000-00-00 00:00:00","lastmodifiedby":"","lastmodifiedon":"0000-00-00 00:00:00","reservedroomsid":"1","reservation_reservationid":"KHAN2016Q221","hotelrooms_hotelroomsid":"1"},{"hotelbrancheshasreservationsid":"145","hotelbranches_hotelbranchesid":"1","reservations_reservationsid":"KHAN2016Q3-34","status":"active","tblid":"146","reservationid":"KHAN2016Q3-34","startdate":"2016-07-24 00:22:31","enddate":"2016-07-25 00:22:37","duration":"1 days 6 seconds ","noofroom":"2","reservationdate":"2016-07-24 00:26:51","guestarrivaldate":"2016-07-24 00:26:30","gestdeparturedate":"2016-07-25 00:26:35","totalreservedadults":"2","totalreservedchilds":"2","totalreservationcharges":"1200","createdby":"1","createdon":"2016-07-24 00:23:05","lastmodifiedby":"","lastmodifiedon":"0000-00-00 00:00:00","reservedroomsid":"91","reservation_reservationid":"KHAN2016Q3-34","hotelrooms_hotelroomsid":"2"},{"hotelbrancheshasreservationsid":"145","hotelbranches_hotelbranchesid":"1","reservations_reservationsid":"KHAN2016Q3-34","status":"active","tblid":"146","reservationid":"KHAN2016Q3-34","startdate":"2016-07-24 00:22:31","enddate":"2016-07-25 00:22:37","duration":"1 days 6 seconds ","noofroom":"2","reservationdate":"2016-07-24 00:26:51","guestarrivaldate":"2016-07-24 00:26:30","gestdeparturedate":"2016-07-25 00:26:35","totalreservedadults":"2","totalreservedchilds":"2","totalreservationcharges":"1200","createdby":"1","createdon":"2016-07-24 00:23:15","lastmodifiedby":"","lastmodifiedon":"0000-00-00 00:00:00","reservedroomsid":"92","reservation_reservationid":"KHAN2016Q3-34","hotelrooms_hotelroomsid":"1"},{"hotelbrancheshasreservationsid":"146","hotelbranches_hotelbranchesid":"1","reservations_reservationsid":"KHAN2016Q3-35","status":"active","tblid":"147","reservationid":"KHAN2016Q3-35","startdate":"2016-07-25 22:05:36","enddate":"2016-07-26 22:05:41","duration":"1 days 5 seconds ","noofroom":"1","reservationdate":"2016-07-25 22:08:07","guestarrivaldate":"2016-07-25 22:07:53","gestdeparturedate":"2016-07-26 22:07:57","totalreservedadults":"1","totalreservedchilds":"","totalreservationcharges":"1500","createdby":"1","createdon":"2016-07-25 22:05:52","lastmodifiedby":"","lastmodifiedon":"0000-00-00 00:00:00","reservedroomsid":"93","reservation_reservationid":"KHAN2016Q3-35","hotelrooms_hotelroomsid":"4"},{"hotelbrancheshasreservationsid":"147","hotelbranches_hotelbranchesid":"1","reservations_reservationsid":"KHAN2016Q3-36","status":"active","tblid":"148","reservationid":"KHAN2016Q3-36","startdate":"2016-07-26 10:54:05","enddate":"2016-07-27 10:54:10","duration":"1 days 5 seconds ","noofroom":"1","reservationdate":"2016-07-26 10:56:15","guestarrivaldate":"2016-07-26 10:55:58","gestdeparturedate":"2016-07-27 10:56:03","totalreservedadults":"1","totalreservedchilds":"","totalreservationcharges":"700","createdby":"1","createdon":"2016-07-26 10:54:28","lastmodifiedby":"","lastmodifiedon":"0000-00-00 00:00:00","reservedroomsid":"94","reservation_reservationid":"KHAN2016Q3-36","hotelrooms_hotelroomsid":"3"}]}