Rearrange items in multidimensional array - php

Question

I have a multidimensional array, I want to take the key 'data' from each array item and form another array, like first array 'data' element has 3 items, second has 1 item, 3rd and 4th are empty, and 5th has one item, I want to make a separate array like $temp_array['first_item_from_first_array,..., first_item_from_fifth_array, 'second_item_from_second_array,....,second_item_From_fifth_array]
input array is,
Array
(
[0] => Array
(
[meal_type] => bf
[label] => Breakfast
[calorie_limit] => 30
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[2] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
)
)
[1] => Array
(
[meal_type] => sn
[label] => Snacks
[calorie_limit] => 10
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
)
)
[2] => Array
(
[meal_type] => lu
[label] => Lunch
[calorie_limit] => 20
[total_calorie] => 0
[data] => Array
(
)
)
[3] => Array
(
[meal_type] => su
[label] => Supper
[calorie_limit] => 30
[total_calorie] => 0
[data] => Array
(
)
)
[4] => Array
(
[meal_type] => dn
[label] => Dinner
[calorie_limit] => 20
[total_calorie] => 0
[data] => Array
(
[0] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)
)
)
the output to be like this
Array
(
[0] => Array
(
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)
[1] => Array
(
[0] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[1] => Array
(
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
)
)
[2] => Array
(
[0] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
[1] => Array
(
)
[2] => Array
(
)
[3] => Array
(
)
[4] => Array
(
)
)
)

Answer 1

You need to do it like below:-
$data_array= array_column($array,'data');
$count = 0;
foreach($data_array as $data){
$real_count = count($data);
if($real_count > $count){
$count = $real_count;
}
}
echo $count;
$final_array = [];
foreach($data_array as $data_arr){
for($i=0;$i< $count; $i++){
$final_array[$i][] = (count($data_arr[$i])>0)? $data_arr[$i]: array();
}
}
echo "<pre/>";print_r($final_array);
Output:-https://eval.in/925383
Reference:- PHP: array_column - Manual

Answer 2

You can use array_column() function
Example :-
<?php
$array = [
[
"meal_type" => "bf",
"data" => [
"name" => "test",
"email" => "test#ymail.com"
]
],
[
"meal_type" => "bf",
"data" => []
]
];
echo "<pre>";
print_r(array_column($array, "data"));
?>

Answer 3

You can do this using foreach and array_push.
$data_item_array = [];
foreach ($array as $item) {
$data = $item['data'];
foreach ($data as $t) {
array_push($data_item_array, $t);
}
}
print_r($data_item_array);
Output will be :
Array
(
[0] => Array
(
[id] => 109
[label] => testfrom
[quantity] => 12
[unit] => g
)
[1] => Array
(
[id] => 118
[label] => test
[quantity] => 200
[unit] => oz
)
[2] => Array
(
[id] => 121
[label] => test
[quantity] => 10
[unit] => g
)
[3] => Array
(
[id] => 120
[label] => testfrom
[quantity] => 12
[unit] => g
)
[4] => Array
(
[id] => 119
[label] => test
[quantity] => 200
[unit] => oz
)
)