PHP Fibers: The Event Loop Simplified

2023/09/04

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The article discusses PHP Fibers and their role in creating asynchronous applications. It focuses on the event loop, which is responsible for monitoring external resources and resuming fibers interested in specific events. The author provides examples of different types of event loops, starting with a simple one that waits a fixed amount of time between iterations. They then explain how to improve the efficiency of the loop by moving the progression test from the fibers to the loop itself. The article also introduces the concept of passing values back to the event loop using PHP's Fiber implementation, allowing for better control over when fibers should be resumed. The author demonstrates how to track values and associate them with fibers using the SplObjectStorage class. Overall, the article provides valuable insights for developers looking to leverage PHP Fibers and optimize their event loops for asynchronous applications.