13.PHP 预定义接口 --- Closure 类

<?phpclass A {    private static $sfoo = 1;    private $ifoo = 2;}$cl1 = static function() {    return A::$sfoo;};$cl2 = function() {    return $this->ifoo;};$bcl1 = Closure::bind($cl1, null, 'A');$bcl2 = Closure::bind($cl2, new A(), 'A');echo $bcl1(), "<br/>";  // 1echo $bcl2(), "<br/>";  // 2

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http://php.net/manual/zh/class.closure.php