Collapsing Laravel Collections using array_collapse

This article is a continuation of the Laravel Array Helper Function: array_collapse article.

The collapse (defined in the Illuminate\Support\Arr helper class) method will also work on Illuminate collections. There is no special syntax required to use collections with the collapse method:

 1<?php
 2 
 3use \Illuminate\Support\Arr;
 4use \Illuminate\Support\Collection;
 5 
 6$testArray = [
 7    new Collection([1,2,3,4]),
 8    new Collection([5,6,7,8])
 9];
10 
11$collapsedArray = Arr::collapse($testArray);

The value of $collapsedArray would then be:

1array (size=8)
2  0 => int 1
3  1 => int 2
4  2 => int 3
5  3 => int 4
6  4 => int 5
7  5 => int 6
8  6 => int 7
9  7 => int 8

Nested collections can also be collapsed:

 1<?php
 2 
 3use \Illuminate\Support\Arr;
 4use \Illuminate\Support\Collection;
 5 
 6$testArray = new Collection([
 7    new Collection([1,2,3,4]),
 8    [5,6,7,8]
 9]);
10 
11$collapsedArray = Arr::collapse($testArray);

The value of collapsed array would then be:

1array (size=8)
2  0 => int 1
3  1 => int 2
4  2 => int 3
5  3 => int 4
6  4 => int 5
7  5 => int 6
8  6 => int 7
9  7 => int 8

∎