- var_dump: documentation ( source)
- rtrim: documentation ( source)
- preg_split: documentation ( source)
- preg_replace: documentation ( source)
<?php
$applicant_person_id='44265,SS 442657, 224585';
// Replace any non-integer at the end by space, then trim it.
$cleanstring = preg_replace("/[^0-9]+/", "", $applicant_person_id);
$person_id_list = rtrim($cleanstring);
var_dump($cleanstring);
// Split on any non-integer value
$person_ids = preg_split("/[^0-9]+/", $person_id_list);
var_dump($person_ids);