Easy way to apply a function to an array

Question

I am aware of array_walk() and array_map(). However when using the former like so (on an old project) it failed

array_walk($_POST,          


        

Answer 1

I know the OP asked to call a function, however in the cases where you do not really need to call a function you can define an anonymous one:

$ids = [1,2,3];
array_walk($ids,function(&$id){$id += 1000;});