Replace the last comma in a string using Regular Expression

Question

I have a string like:
\"item 1, item 2, item 3\".
What I need is to transform it to:
\"item 1, item 2 and item 3\".

I

Answer 1

This regex finds last coma: (,)[^,]*$

Answer 2

Use greediness to achieve this:

$text = preg_replace('/(.*),/','$1 and',$text)

This matches everything to the last comma and replaces it through itself w/o the comma.