Multidimensional array to array in PHP

Question

I have an array like this

$category = [
'cat1' => [
    'images/category/cat1/icon1.jpg',
    'images/category/cat1/icon2.jpg',
    'images/category/cat1/icon3.jpg',
],
'cat2' => [
    'images/category/cat2/icon1.jpg',
    'images/category/cat2/icon2.jpg',
    'images/category/cat2/icon3.jpg',
]
];

I want to get the array like this

$categories = [
'images/category/cat1/icon1.jpg',
'images/category/cat1/icon2.jpg',
'images/category/cat1/icon3.jpg',
'images/category/cat2/icon1.jpg',
'images/category/cat2/icon2.jpg',
'images/category/cat2/icon3.jpg',
];

I tried this but not got expected output.

$categories = array_map(function($cat){return $cat;},$category);

You're more likely to get help if you post the actual output you received. (But thanks for showing us what output you want and what you tried.) — Jeffrey Bosboom, Dec 18 '14 at 02:23
possible duplicate of [How to "flatten" a multi-dimensional array to simple one in PHP?](http://stackoverflow.com/questions/526556/how-to-flatten-a-multi-dimensional-array-to-simple-one-in-php) — Prasanth Bendra, Dec 18 '14 at 13:22
http://stackoverflow.com/questions/526556/how-to-flatten-a-multi-dimensional-array-to-simple-one-in-php/14972714#14972714 — Prasanth Bendra, Dec 18 '14 at 13:22

score 4 · Accepted Answer · answered Dec 18 '14 at 02:24

4

You can use call_user_func_array in conjuction with array_merge:

$category = call_user_func_array('array_merge', $category);

answered Dec 18 '14 at 02:24

Kevin

41,694
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score 1 · Answer 2 · answered Dec 18 '14 at 02:25

1

Can be solve by array_reduce() & array_merge()

$categories = array_reduce($category, function($old, $new){
    return array_merge($old, $new);
}, array());

answered Dec 18 '14 at 02:25

MH2K9

11,951
7
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49

Multidimensional array to array in PHP

2 Answers2