Online PHP editor | refs for hK0db

<?php $a = []; $a['aaaa']['mode'] = 'test'; $a['b'] = false; $a['c'] = ''; $a['d'] = 0; $a['e'] = new \stdClass(); $a['f'] = null; var_dump('isset'); var_dump(isset($a['a'])); var_dump(isset($a['b'])); var_dump(isset($a['c'])); var_dump(isset($a['d'])); var_dump(isset($a['e'])); var_dump(isset($a['f'])); var_dump('empty'); var_dump(empty($a['a'])); var_dump(empty($a['b'])); var_dump(empty($a['c'])); var_dump(empty($a['d'])); var_dump(empty($a['e'])); var_dump(empty($a['f']));