基础题:对象引用问题？
<?php<br />
$global_obj=null;<br />
<br />
class Demo{<br />
var $my_val;<br />
public function __construct(){<br />
global $global_obj;<br />
$global_obj=&$this;<br />
}<br />
}<br />
<br />
$p=new Demo();<br />
<br />
$p->my_val=5;<br />
<br />
global $global_obj;<br />
<br />
$global_obj->my_val=10;<br />
<br />
echo $p->my_val; //输出5<br />
<br />
var_dump($p===$global_obj); //返回false<br />
?>
