How to merge multiple dimension array cakephp - php

Question

I just using function query() of cakePhp. The query will return array something like :
array(
(int) 0 => array(
'cate' => array(
'date' => '2016-12-05',
),
'cate_detail' => array(
'rel_data_category' => '11'
),
'cate_item' => array(
'price' => '150.000'
)
),
(int) 1 => array(
'cate' => array(
'date' => '2016-12-05',
),
'cate_detail' => array(
'rel_data_category' => '10'
),
'cate_item' => array(
'price' => '250.000'
)
),
(int) 2 => array(
'cate' => array(
'date' => '2016-12-06',
),
'cate_detail' => array(
'rel_data_category' => '10'
),
'cate_item' => array(
'price' => '250.000'
)
)
)
Now, I want to check if array have the same cate.date will merge array (in this case is elements 0,1 of my array). Output something like :
array(
(int) 0 => array(
'cate' => array(
'date' => '2016-12-05',
),
'cate_detail' => array(
(int) 0 => array (
'rel_data_category' => '11',
'price' => '150.000'
),
(int) 1 => array(
'rel_data_category' => '10',
'price' => '250.000'
)
)
),
(int) 1 => array(
'cate' => array(
'date' => '2016-12-06',
),
'cate_detail' => array(
(int) 0 => array (
'rel_data_category' => '10'
'price' => '250.000'
)
)
)
)
Please help!

Answer 1

You will need to loop through the results and build a new array with the data in the form you want. You can use the CakePHP Hash::extract() method to map the dates to indexes so that you can combine the data for the dates.
For example:-
// Get out all the dates available and then flip the array so that we have a map of dates to indexes
$dates = Hash::extract($results, '{n}.cate.date');
$datesMap = array_flip($dates);
// Define an empty array that we will store the new merged data in
$data = [];
// Loop through the query results and write to the $data array using the map of dates
foreach ($results as $result) {
$key = $datesMap[$result['cate']['date']];
$data[$key]['cate'] = $result['cate'];
$data[$key]['cate_detail'][] = [
'rel_data_category' => $result['cate_detail']['rel_data_category'],
'price' => $result['cate_item']['price']
];
}