How to find all substrings of a string in PHP

Question

I need to convert strings of the form

\"a b c\"

into arrays of the form

Array
(
    [0] => a
    [1] => a b
    [2] =         


        

Answer 1

For even quite short strings, the memory and runtime requirement will explode. Even in native code this is a scary performance problem.

Justify why you need this function, and work out another way around the problem.