Time/Space complexity of PHP Array

Question

Is there a way or a resource for finding the time and space complexity of the Array implementation in PHP other than calculating it by hand?

An array

Answer 1

Because it acts like a hash table, you will have O(1) time when accessing an element by a key.

If you are looping through the array, naturally you will have O(n) time.

If you have time, you can actually check out PHP's implementation of array here