public function -run($type){ $type->version(); $type->work();} 函数的值怎么能是函数呢，函数的值到底是怎么规定的
回复讨论(解决方案)
函数的参数可以是任何数据（当然你可以自己限定）
在你示例的代码中 $type 就是一个对象
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