Simple PHP Array: Manipulate the entries of an array

This class can manipulate the entries of an array.

It wraps around an array and provides several types of functions to manipulate the array entries. Currently it can:

- Append the values of another given array to the array
- Add a value to the array at the end or at a given position
- Set an array entry at a given position to a given value
- Change all array entries with a given value to another value
- Get the positions of all array entries with a given value
- Remove array entries at a given position or with a given value
- Etc.