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I have a PHP script running on a cron that can take a long time to process fully (e.g. 10 minutes). What would happen if this script was modified while it’s being parsed? or during execution? The reason I ask is I have a number of scripts across servers that I want to place under version control and i’m concerned about what might happen if the script happens to get updated while it is processing. If it is an issue then I could place some kind of lock on the file while it is running.
Nothing should happen to the running script, because by the time it starts running, PHP would have already parsed it and the opcodes are already in memory, so there’s no more disk access.