Online PHP editor | refs for aOnXr

<?php var_dump(filter_var('x', FILTER_VALIDATE_INT, [ 'options' => ['default' => 9], ])); var_dump(filter_var(STDERR, FILTER_VALIDATE_INT, [ 'options' => ['default' => 9], ])); var_dump(filter_var((object) [], FILTER_VALIDATE_INT, [ 'options' => ['default' => 9], ])); var_dump(filter_var([], FILTER_VALIDATE_INT, [ 'options' => ['default' => 9], ]));