PHP push value array from one in another - php

Question

i have two arrays and want to get one
//first
[0] => Array (
[drink] => A
[litres] => 100.05
)
[1] => Array (
[drink] => B
[litres] => 3943
)
[2] => Array (
[drink] => C
[litres] => 1.46
)
//second
[0] => 22
[1] => 12
[2] => 16
The result should be:
[0] => Array (
[drink] => A
[litres] => 100.05
[price] => 22
)
[1] => Array (
[drink] => B
[litres] => 3943
[price] => 12
)
[2] => Array (
[drink] => C
[litres] => 1.46
[price] => 16
)
i tried with loops , merge etc all i should find on this site. But i dont get it.
foreach ($arr as $array2) {
$array1[] = array( 'price' => $array2 );
}
print_r($array1);
i dont get it
Thanks in advance

Answer 1

$result = array_map(function($i, $j) { return array_merge($i, array('price'=>$j)); },
$arr1, $arr2);
demo on eval.in

Answer 2

Short solution using array_map and array_merge functions:
$result = array_map(function($a, $b){
return array_merge($a, ['price'=>$b]);
}, $arr1, $arr2);
print_r($result);
The output:
Array
(
[0] => Array
(
[drink] => A
[litres] => 100.05
[price] => 22
)
[1] => Array
(
[drink] => B
[litres] => 3943
[price] => 12
)
[2] => Array
(
[drink] => C
[litres] => 1.46
[price] => 16
)
)

Answer 3

The other answers are correct methods, I just want to show how it can be done with a foreach() loop:
Code:
$a=[
["drink"=>"A","litres"=>100.05],
["drink"=>"B","litres"=>3943],
["drink"=>"C","litres"=>1.46]
];
$b=[22,12,16];
foreach($a as $i=>$subarray){
$a[$i]["price"]=$b[$i];
}
var_export($a);
This method is not a one-liner but will run slightly faster because it has fewer function calls and it will also be easier to read by most people. (Though I'll admit -- I lean toward one-liners) Note, my method doesn't declare a new result variable, it just extends the first array.
Output (as desired):
array (
0 =>
array (
'drink' => 'A',
'litres' => 100.05,
'price' => 22,
),
1 =>
array (
'drink' => 'B',
'litres' => 3943,
'price' => 12,
),
2 =>
array (
'drink' => 'C',
'litres' => 1.46,
'price' => 16,
),
)