How to sort an array of names by surname preserving the keys

Question

I have an array as follows:

Array(
    [27] => \'Sarah Green\',
    [29] => \'Adam Brown\',
    [68] => \'Fred Able\'
);

I\'d like

Answer 1

I'm not sure if there's a straight-forward way of sorting your example array by surnames.

You could add names to the array in a different manner. i.e. "Fred Able" would become "Able, Fred". That would allow you to use PHP's inbuilt array-sorting functions.

Failing that, you might have to go through each array element and explode by whitespace, using the last piece of the returned array as your surname. A bit messy, but I'm sure there are tonnes of examples and functions out there.