小编Whi*_*lue的帖子

class database{
    protected $db;

    protected function connect(){
        $this->db = new mysqli( /* DB info */ ); // Connecting to a database
    }
}

class example extends database{
    public function __construct(){
        $this->connect();
    }

    public static function doQuery(){
        $query = $this->db->query("theQuery");   // Not working.
        $query = self::$db->query("theQuery");   // Not working.
        $query = parent::$db->query("theQuery"); // Also not working.
    }
}

我想做类似的事情,但我找不到有效的方法,该属性必须静态......

如何在子构造函数之前运行父构造函数？(代码:)

class database{
    public function __construct(){
        // Connect to database
    }
}

class child extends database{
    public function __construct(){
        // Do something
    }
}

我希望它连接到数据库,然后运行子的构造函数,这可能吗？