How to increase by 1 all keys in an array?

Question

What is the simplest solution to increase by 1 all keys in an array?

BEFORE:

$arr[0] = 'a'; $arr[1] = 'b'; $arr[2] = 'c'; 

AFTER:

$arr[1] = 'a'; $arr[2] = 'b'; $arr[3] = 'c'; 

Answer 1

You can use

$start_zero = array_values($array); /* Re-Indexing Array To Start From Zero */ 

And if you want to start it from index 1 use

$start_one = array_combine(range(1, count($array)), array_values($array));