[Split by Comma but not if in Parenthesis] #regex #split #array

split.php

<?php
  
$filters = "1,2,4,(5,6,7),8;9";
var_dump(preg_split("~[,|;](?![^(]*\\))~", $filters));

/*
array (size=6)
  0 => string '1' (length=1)
  1 => string '2' (length=1)
  2 => string '4' (length=1)
  3 => string '(5,6,7)' (length=7)
  4 => string '8' (length=1)
  5 => string '9' (length=1)
*/