Laravel Array Helper Function: array_flatten

The flatten helper method is similar to the dot method in that it takes a multi-dimensional array and transforms it into a new array with only one dimension. While the dot method preserves the keys by separating them with dots, the flatten method will create a new array containing the original array's data whilst throwing away the array's keys.

The signature for the flatten helper method is:

flatten($array)

Consider the following array:

1<?php
2 
3$arrayToFlatten = [
4    'keys'    => 'first value',
5    'will'    => 'second value',
6    'be'      => 'third value',
7    'removed' => 'fourth value'
8];

If we flatten the array like so:

1$newArray = Arr::flatten($arrayToFlatten);

the resulting array would be:

1array(4) {
2    [0] "first value"
3    [1] "second value"
4    [2] "third value"
5    [3] "fourth value"
6}

#array_flatten($array)

The array_flatten function is a shortcut to calling Arr::flatten. This function is declared in the global namespace.

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