How to get all combinations of elements of an array with a size of at least and at most N characters?

Question

PHP

We have an array:
$arr = array('a','b','c','d','e','f','g');
Tell me how to get all possible combinations of array elements with a size of at least and no more than 4 characters?
PS: for example, bcda, acdg etc.

Answer 1

Here is the solution to your problem.