In modern Internet applications, high concurrency has become an important criterion for testing the performance of a platform.PHP, as a popular server-side scripting language, faces a number of challenges in handling highly concurrent requests, despite its unique advantages in rapid development and deployment. However, by adopting appropriate strategies and modern tools, PHP is fully capable of handling highly concurrent environments. In this article, we will explore in detail the strategies for optimizing PHP in the face of high concurrency and highlight how two technologies, ReactPHP and Swoole, have been used to improve PHP applications...