Concurrency

Concurrency, sometimes misspelled concurency, is a concept in computing where multiple tasks are in progress at the same time.

PHP uses several ways to handle concurrency:

• Externally, by the webserver or PHP-fpm
• Internally, with forked processes, with pcntl
• Internally, with threads, with parallel
• Cooperating, with fibers
• Non-blocking IO, with swoole or amphp.

Documentation

See Also

• Understanding Concurrency in PHP
• Understanding Fibers in PHP: A New Way to Handle Concurrency
• PHP is 5x Faster Than NestJS? Rethinking High-Load with Swoole

Related

• Thread
• Process
• Asynchronous
• FastCGI Process Manager (FPM)
• Atomic Operation
• file_put_contents()
• Mutex
• Race Condition
• Actor Model
• Cache Stampede
• Green Thread
• Software Transactional Memory (STM)
• Asynchronous Markup Protocol (AMP)
• ReactPHP
• Semaphore
• Shared Memory
• Shared