Push in array if key exists - php

Question

I have the following multidimensional array:
Array
(
[0] => Array
(
[name] => Viettel
[data] => Array
(
[0] => 1559881644000,500
)
)
[1] => Array
(
[name] => FPT
[data] => Array
(
[0] => 1559994465000,172
)
)
[2] => Array
(
[name] => MobiFone
[data] => Array
(
[0] => 1559997314000,11164
)
)
[3] => Array
(
[name] => Vietnamobile
[data] => Array
(
[0] => 1559993699000,1246
)
)
[4] => Array
(
[name] => Viettel
[data] => Array
(
[0] => 1560000096000,47886
)
)
[5] => Array
(
[name] => VinaPhone
[data] => Array
(
[0] => 1559997553000,11132
)
)
[6] => Array
(
[name] => VNPT
[data] => Array
(
[0] => 1559993066000,84
)
)
)
I'm currently using a foreach loop to extract the values from the array:
$result = [];
$nameData = [];
foreach($data as $key => $itemData)
{
}
I want array look like this:
Array
(
[0] => Array
(
[name] => Viettel
[data] => Array
(
[0] => 1559881644000,500
[1] => 1560000096000,47886
)
)
[1] => Array
(
[name] => FPT
[data] => Array
(
[0] => 1559994465000,172
)
)
[2] => Array
(
[name] => MobiFone
[data] => Array
(
[0] => 1559997314000,11164
)
)
[3] => Array
(
[name] => Vietnamobile
[data] => Array
(
[0] => 1559993699000,1246
)
)
[4] => Array
(
[name] => VinaPhone
[data] => Array
(
[0] => 1559997553000,11132
)
)
[5] => Array
(
[name] => VNPT
[data] => Array
(
[0] => 1559993066000,84
)
)
)

Answer 1

It seems you are looking for groupby the array by name.
You can use foreach with array_key_exists and array_push
$groupBy = [];
foreach($a as $v){
array_key_exists($v['name'], $groupBy) ?
array_push($groupBy[$v['name']]['data'], $v['data'][0])
:
($groupBy[$v['name']] = $v)
;
}
If you want to rearrange the keys of array, you can use array_values
print_r(array_values($groupBy));
Working DEMO :- https://3v4l.org/ASWDV

Answer 2

You can just loop over the input array, adding values to the output if they don't exist and merging that data values if they do:
$result = array();
foreach ($data as $itemData) {
if (($k = array_search($itemData['name'], array_column($result, 'name'))) !== false) {
$result[$k]['data'] = array_merge($result[$k]['data'], $itemData['data']);
}
else $result[] = $itemData;
}
print_r($result);
Output is as you desire (too long to reproduce here)
Demo on 3v4l.org

Answer 3

If you are adding a single value to the array you can just access to it with something like this:
$result[0]['data'][1] = 1560000096000,47886