Online PHP editor | refs for TTdCX

<?php function filterLabel($label) { $filtered = trim($label); $array = array($filtered => 1); $filtered = key($array); if ($filtered === false) { throw new UnexpectedValueException('Unable to filter %s', var_export($label, true)); } return $filtered; } $data = array("foo", "0foo", 0, "0", "00", 1, NULL, FALSE, new SimpleXMLElement('<root />')); foreach ($data as $index => $label) { printf("==== %d ====\n", $index); var_dump($label, filterLabel($label)); }