run through each of them in the order they are defined

参考php.net/splautoloadregister

bool spl_autoload_register  ([ callback $autoload_function  [, bool $throw = true  [, bool $prepend = false  ]]] )

函数定义中的callback是Pseudo-type，上面的用法是对应这条：

Static class methods can also be passed without instantiating an object of that class by passing the class name instead of an object at index 0.

即第一个元素为类名，第二个为静态方法名

更新

还有一种调用方法似乎更简单，直接定义一个__autoload($className)函数即可：

function __autoload($class)
{
    echo 'win!';
}

new nocush;