Sometimes, we want to flatten a multidimensional array with PHP.
In this article, we’ll look at how to flatten a multidimensional array with PHP.
How to flatten a multidimensional array with PHP?
To flatten a multidimensional array with PHP, we call array_merge with all the nested arrays that want to flatten.
For instance, we write
$flattened = array_merge(...$a);
to call array_merge with the nested arrays in the $a array to merge the nested array into a single array and return it.
... unpacks the nested arrays as arguments of array_merge.
Conclusion
To flatten a multidimensional array with PHP, we call array_merge with all the nested arrays that want to flatten.
