![]() They are not the real thing that are available in almost any other languages and they don't hold a candle to really powerful async APIs like libdispatch, but Fibres are what we have to work with, so you should consider using them. There's generally some kind of "run loop" that does a tiny bit of work (as in execute a single fast function) with each iteration of the loop. And a lot of PHP systems spend 99.99% of their time waiting for input and output. It works fine for certain task such as waiting for input or sending data over a slow network connection. the music player would schedule a second of audio, then tell your word processor to check if you've typed a key on the keyboard, then the word processor tells the audio processor it can do some work, rinse and repeat over and over (thousands of times a second) and you don't have "real" multi-tasking, but you have an effective way to kind of do two things once (though not really at once). play music while the user is typing text) those two tasks had to jump through hoops and "cooperate" with each other. If you wanted to do two things at once (e.g. It's not as crazy as it sounds - back in the day entire operating systems were single threaded. PHP is unfortunately a single threaded language other than of course you can execute multiple PHP scripts at once (potentially not even on the same hardware).įibers are workaround for that limitation - it's a structured way to pause your current execution and do something else, then come back to the current execution. So now I have a way to call findOneById(id), each will suspend while waiting for additional calls to the same in other resolvers, and then when it loops back to the first one it does a single query for SELECT * FROM t1 WHERE id IN (1,2,3,4,5) and each call pulls its data from the one query.Īfter that I started working on a Fiber-y Promise implementation (WIP) for compatibility with libraries that still expect to receive or return promises like webonyx/graphql. That's the next thing I did using mysqli_poll. However, if you were to create a MySQLi connection that contained this code and wrapped API resolvers (or multi-request handlers) each in a Fiber then you could have multiple branches of logic or requests being processed while waiting for the database call to return. log($e) and continue, set to output, or throwīy itself this is pretty basic and involves polluting your code with a lot of Fiber::getCurrent() & Fiber::suspend() calls (just in case you're not in a Fiber you can't just call Fiber::suspend(). A fiber-only "event loop" would look something like this: $fibers = This is actually something I've been working with the last couple of days. ![]() Check out for an example of something that is both async/fiber and can sleep for a configurable amount of time. While you can do most things just using Fibers, for something like sleep you'll need to include or build in an Event Loop. The reason your first example isn't async is because sleep is a blocking call and nothing is calling Fiber::suspend to release control of the synchronous thread back to $fiber1->start(). Is there currently a way to run asynchronous tasks using native PHP at the moment?Įquivalent to a Task in C# or Promise in JavaScript. ![]() How is this async if ->start() is returning a value to $value? (from ->suspend(.)) How is this different from invoking normal functions?Įcho "Value from fiber suspending: ", $value, PHP_EOL Every time I hear the Fibers topic, there's always a reference to async/await and frameworks that implement async/await.īut I'm not getting how they are related, since I can't get anything async by using Fibers.
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