php array merge on key using multidimensional array [duplicate] - php

Question

This question already has answers here:
Merge row data from multiple arrays
(6 answers)
Closed 4 months ago.
This is my array:
array
0 =>
array
'id' => int 220950
'order_reference' => string '600125479'
1 =>
array
'id' => int 220985
'order_reference' => string '498638'
and this my another array
array
0 =>
array
'entity_id' => 1
'order_status' => 'test'
1 =>
array
'entity_id' => 2
'order_status' => 'test2'
and my goal is to achieve this:
array
0 =>
array
'id' => int 220950
'order_reference' => string '600125479'
'entity_id' => 1
'order_status' => 'test'
1 =>
array
'id' => int 220985
'order_reference' => string '498638'
'entity_id' => 2
'order_status' => 'test2'
with array_merge I managed to get this(NOT my desired goal) and this all I found on stackoverflow and other forums:
array
0 =>
array
'id' => int 220950
'order_reference' => string '600125479'
1 =>
array
'id' => int 220985
'order_reference' => string '498638'
array
2 =>
array
'entity_id' => 1
'order_status' => 'test'
3 =>
array
'entity_id' => 2
'order_status' => 'test2'
Any ideas or suggestions are welcomed :) thank you
Using a foreach I can add the keys values, but I am looking for a more cleanest way :)

Answer 1

Here's the answer to your question using array_map and array_merge_recursive.
<?php
$array1 = array(
[
"id" => 220950,
"order_reference" => "600125479"
],
[
"id" => 220985,
"order_reference" => "498638"
]
);
$array2 = array(
[
"entity_id" => 1,
"order_status" => "test"
],
[
"entity_id" => 2,
"order_status" => "test"
]
);
$results = array();
array_map(function($array1, $array2) use (&$results) {
$results[] = array_merge_recursive($array1, $array2);
}, $array1, $array2);
var_dump($results);
This will output:
array (size=2)
0 =>
array (size=4)
'id' => int 220950
'order_reference' => string '600125479' (length=9)
'entity_id' => int 1
'order_status' => string 'test' (length=4)
1 =>
array (size=4)
'id' => int 220985
'order_reference' => string '498638' (length=6)
'entity_id' => int 2
'order_status' => string 'test' (length=4)

Answer 2

With the caveat that your arrays don't have a joint value to compare against so you need to make sure that the keys always line up, I think a loop like this will do the trick:
for ($i = 0; $i < count($array1); $i++)
{
$new_array[] = array_merge($array1[$i], $array2[$i]);
}
Edit: You can also use array_map() but it doesn't offer any performance advantages AFAIK, and is overall less readable.
$new_array = array_map(function($a1_v, $a2_v) { return array_merge($a1_v, $a2_v); }, $a1, $a2);

Answer 3

Use array_merge with array_map
$array1 = array(
[
"id" => 220950,
"order_reference" => "600125479"
],
[
"id" => 220985,
"order_reference" => "498638"
]
);
$array2 = array(
[
"entity_id" => 1,
"order_status" => "test"
],
[
"entity_id" => 2,
"order_status" => "test2"
]
);
$result = array_map("array_merge",$array1,$array2);
print_r($result);
Output
Array
(
[0] => Array
(
[id] => 220950
[order_reference] => 600125479
[entity_id] => 1
[order_status] => test
)
[1] => Array
(
[id] => 220985
[order_reference] => 498638
[entity_id] => 2
[order_status] => test2
)
)
Working example