Online PHP editor | refs for gh8U7

<?php var_dump(filter_var('TRUE', FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var('true', FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var(1, FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var('FALSE', FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var('false', FILTER_VALIDATE_BOOLEAN)); var_dump(filter_var(0, FILTER_VALIDATE_BOOLEAN));