Sometimes, we want to flatten a multi-dimensional array to simple one in PHP.
In this article, we’ll look at how to flatten a multi-dimensional array to simple one in PHP.
How to flatten a multi-dimensional array to simple one in PHP?
To flatten a multi-dimensional array to simple one in PHP, we call the array_merge function.
For instance, we write
$notFlat = [[1, 2], [3, 4]];
$flat = array_merge(...$notFlat);
var_dump($flat);
to call array_merge with the arrays in the $notFlat array as arguments.
Then $flat is an array with the entries in each nested array.
Conclusion
To flatten a multi-dimensional array to simple one in PHP, we call the array_merge function.
