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class A extends father{
function __construct() {
echo "abstract<br>";
parent::base(); //¸¸Àà·½·¨
$s=$this->stu; //Ö¸Ïò¸¸ÀàÊôÐÔ
}
function A(){}
function B(){
$this->A(); //Ö¸Ïò±¾ÀàA·½·¨
}
}
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