posix_getpidDescriptionThis function simply returns the process ID of the calling process. This value is often used to create process-specific temporary filenames and so forth; however, you may want to use something like tempnam() for that instead. This function is always successful.
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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