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
– Jeffrey Bosboom, Commented Dec 18, 2014 at 2:23
possible duplicate of How to "flatten" a multi-dimensional array to simple one in PHP? — Prasanth Bendra
– Prasanth Bendra, Commented Dec 18, 2014 at 13:22

Kevin · Accepted Answer · 2014-12-18 02:24:57Z

4

You can use call_user_func_array in conjuction with array_merge:

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

answered Dec 18, 2014 at 2:24

Kevin

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MH2K9 · Accepted Answer · 2014-12-18 02:25:13Z

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, 2014 at 2:25

MH2K9

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