Multiprocessing in PHP

Multiprocessing or multithreading?

Not to be confused with multithreading, multiprocessing is another concurrency technique with the fundamental idea of processing tasks in parallel by spawning new processes with unique process identifiers and memory allocations. Achieving task parallelization through multiprocessing is possible through an Inter-Process Communication (IPC) facilitated by signals, or asynchronous Unix-system based notifications analogous to interrupts. As is the case with threading, PHP isn’t built to extensively support multiprocessing which, like threading, is contingent on an understanding of Operating System deficiencies and limitations.

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