Callbacks are nifty

[filburt1]

I finally found a way to emulate an event firing model from Java: callbacks. http://www.php.net/callback and http://www.php.net/create_function . Nowhere near as clean as Java with implementing interfaces and providing listeners, but it works:


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Now $installer->upgrade() will fire the callback function as it executes, providing status updates. Calling the callback is as simple as:


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Of course, in Java, it would be more like:


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...but that would require PHP 5 at least because of the abstractifiedness needed.

[Andreas]

May I ask why you are using create_function()?

[filburt1]

To create an anonymous function rather than one publicly accessible by every other bit of code.