Is PHP multi threaded ?

[Anon]

im just curious. from what i can tell its not multi-threaded. but can it be setup as a mult-threaded application for high traffic sites?

[Anon]

The PHP language doesn't have features which makes you program multithreaded web-applications. But PHP may be executed from multithreaded web-servers. And nothing prevents a PHP extension to work with threads.

Don't fall in love with a word like "multithreaded". Because it doesn't automatically mean "better for high-traffic sites".

[Anon]

This is especially true on Linux, where thread switching is only a tiny bit faster than process switching.

On NT/Win2K, multi-threading is a necesity brought on by it's very poor context switching time between processes, and a lack of quality shared memory protocols for processes.