Array Push Inside an array - php

Question

I want to push another array inside array.
This is my array. I want to push another array on textTabs .
Array
(
[recipients] => Array
(
[signers] => Array
(
[0] => Array
(
[email] => rm#gmail.com
[tabs] => Array
(
[checkboxTabs] => Array
(
[0] => Array
(
[tabLabel] => sampleCheckbox
)
)
[textTabs] => Array
(
[0] => Array
(
[tabLabel] => CompanyName
[value] => Qwerty
)
[1] => Array
(
[tabLabel] => TradingName
[value] => Qwerty
)
[2] => Array
(
[tabLabel] => ContactName
[value] => RM
)
)
)
)
)
)
)
This is my array that i want to add:
$array2 = array(
"tabLabel"=>"MonthlyTotal",
"value"=>$monthlytotal
);
And this is my php code:
$data = array_push($array1['recipients']['signers']['0']['tabs']['textTabs'], $array2);
But I was not able to push it. Thank you for your help.

Answer 1

No need of assignment of array_push() to $data,as child-array pushed to initial array itself. Just do:
array_push($array1['recipients']['signers']['0']['tabs']['textTabs'], $array2);
print_r($array1);
Output:- https://3v4l.org/sntUP
I always prefer doing assignment like below:
$array1['recipients']['signers']['0']['tabs']['textTabs'][] = $array2;
Output:-https://3v4l.org/nHHUB

Answer 2

If you do love a portable way to do add an array or any other values to any key, you may do it using recursive function. Let's see an example below:
<?php
$old_array = [
'one' => 'value for one',
'two' => 'value for two',
'three' => [
'four' => 'value for four',
'five' => 'value for five',
'six' => [
'seven' => 'value for seven',
'eight' => 'value for eight',
],
],
];
function addArrayToKey($array, $callback){
$result = [];
foreach($array as $key => $value){
if(is_array($value)) {
$result[$key] = addArrayToKey($value, $callback);
} else {
$result[$key] = $callback($key, $value);
}
}
return $result;
}
function callback($key, $value) {
if('seven' == $key) {
return ['one', 'two', 'three' => ['four', 'five']];
}
return $value;
}
echo '<pre>';
print_r(addArrayToKey($old_array, 'callback'));