<?php function normalizeArray($ids) { $res = array(); $ids = (array) $ids; if (count($ids) > 0) { foreach ($ids as $id) { if (is_numeric($id)) { $res[] = (int) ($id); } } } return $res; } $s = ', '; $s = explode(',',$s); $i = normalizeArray($s); var_dump($i);
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