php解决shutdown回调死循环问题【转】

class UnregisterableCallback{

    // Store the Callback for Later
    private $callback;

    // Check if the argument is callable, if so store it
    public function __construct($callback)
    {
        if(is_callable($callback))
        {
            $this->callback = $callback;
        }
        else
        {
            throw new InvalidArgumentException(“Not a Callback”);
        }
    }

    // Check if the argument has been unregistered, if not call it
    public function call()
    {
        if($this->callback == false)
            return false;

        $callback = $this->callback;
        $callback(); // weird PHP bug
    }

    // Unregister the callback
    public function unregister()
    {
        $this->callback = false;
    }
}
Basic usage:

$callback = new UnregisterableCallback(array($object, “myFunc”));

register_shutdown_function(array($callback, “call”));
To unregister

$callback->unregister();

转自：https://stackoverflow.com/questions/2726524/can-you-unregister-a-shutdown-function

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