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I have a question about how PHP handles filesystem operations. I’m running this code that depends on a file being created before it gets used, and it feels like when I run the code it becomes a race condition – sometimes it works, the file is created and php code uses it, sometimes it fails.
So I was wondering how php handles filesystem operations, does it send it off in the background or does it wait till the operation complete?
Yes, unless you open a file handle and then set it to non-blocking mode:
stream_set_blocking()