Insert Array to Array Collection without looping - php

Question

I have two array..
Array 1
$arr1 = array(
'task' => 'delete'
)
Array 2
$arr2 = array(
array(
'id' => '1',
'type' => 'post',
),
array(
'id' => '2',
'type' => 'category',
),
array(
'id' => '1',
'type' => 'tag',
),
);
How I insert Array 1 to all Array 2 collection, so the results is.
$arr2 = array(
array(
'id' => '1',
'task' => 'delete',
'type' => 'post',
),
array(
'id' => '2',
'task' => 'delete',
'type' => 'category',
),
array(
'id' => '1',
'task' => 'delete',
'type' => 'tag',
),
);
I can be easily to get the results by using looping, but I want to achieve it not using looping.
Any suggestion ?
Thank you :)

Answer 1

In order to push arraay1 in array2 all indexes, you can use the array_walk with a combination of array merge, you can see below code for instance
<?php
$array1 = array(
'task' => 'delete',
'before' =>'test'
);
$array2=array(
array(
'id' => '1',
'type' => 'post',
),
array(
'id' => '2',
'type' => 'category',
),
array(
'id' => '1',
'type' => 'tag',
),
);
array_walk($array2, function(&$newarray) use ($array1) {
$newarray = array_merge($newarray, $array1);
});
print_r($array2);
?>
array_walk -Apply a user supplied function to every member of an array while array_merge, Merge two arrays into one array
Result
Array (
[0] => Array ( [id] => 1 [type] => post [task] => delete [before] => test )
[1] => Array ( [id] => 2 [type] => category [task] => delete [before] => test )
[2] => Array ( [id] => 1 [type] => tag [task] => delete [before] => test ) )
Git Hub
https://github.com/fahadpatel/insert-array-into-array-without-loop
DEMO

Answer 2

You can use array_walk to skip writing the loop.
$arr1 = array(
'task' => 'delete'
);
$arr2 = array(
array(
'id' => '1',
'type' => 'post',
),
array(
'id' => '2',
'type' => 'category',
),
array(
'id' => '1',
'type' => 'tag',
),
);
array_walk($arr2, function(&$item) use ($arr1) {
$item = array_merge($item, $arr1);
});
You can see the documentation for array_walk here.

Answer 3

You may use array_map. It's looping behind the scenes, though (no real way around it), but at least you don't have to do it yourself:
$arr3 = array_map(static function ($entry) use ($arr1) {
return $entry + $arr1;
}, $arr2);
PHP 7.4 version:
$arr3 = array_map(static fn($entry) => $entry + $arr1, $arr2);
Demo: https://3v4l.org/2u2SR