--TEST-- ReflectionFunction::isVariadic() --FILE-- <?php function test1($args) {} function test2(...$args) {} function test3($arg, ...$args) {} var_dump((new ReflectionFunction('test1'))->isVariadic()); var_dump((new ReflectionFunction('test2'))->isVariadic()); var_dump((new ReflectionFunction('test3'))->isVariadic()); ?> --EXPECT-- bool(false) bool(true) bool(true)