Replace 2 commas separated by space with space using php

Question

Hi friends am trying to replace two commas separated by space with space using php. Here is my code

Suppose for example am having variable like

 $va         


        

Answer 1

preg_replace('/(,\s?)+$/', '', "hello, welcome, , , ,");

Basically, match every contiguous sequence of , until the end of the string.

see https://regex101.com/r/rSp90e/1 for a demo.