PHP remove commas from numeric strings

Question

In PHP, I have an array of variables that are ALL strings. Some of the values stored are numeric strings with commas.

What I need:

A way to trim the comma

Answer 1

 function cleanData($a) {

     if(is_numeric($a)) {

     $a = preg_replace('/[^0-9,]/s', '', $a);
     }

     return $a;

}