class A{
<code> public $age = 50;
private $money = 2000;
static public $head = 1;
public function tell(){
echo $this->age,'<br />';
echo self::$head,'<br />';
}
static public function sayMoney(){
echo $this->money,'<br />';
}</code>}
class B extends A{
<code> public $age = 22;
private $money = 10;
public function subtell(){
parent::tell();
echo $this->age,'<br />';
}
public function subMoney()
{
parent::sayMoney();
echo $this->money,'<br />';
}</code>}
$b = new B();
$b->subtell();//22 1 22;
echo '
最後一句話報錯Using $this when not in object context
但在呼叫subMoney()時不就綁定了$this,$this指向b對象，之後執行parent ::sayMoney();由於靜態調用，所以不綁定$this.在sayMoney（）執行的時候不應該得到2000嗎，為什麼會報錯，和前面$b->subtell();調用有啥不一樣
