引用

$t = array(); $foobar = new stdClass(); $foobar->arg = &$t; $t[] = 'a'; $t[] = 'b'; print_r($foobar->arg); $foobar->arg[] = 'c'; print_r($foobar->arg); print_r($t); die();

无论如何，我觉得这样使得变量的生命周期延长了