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# posix_getsid

(3.0.10 - 3.0.18 only, PHP 4 >= 4.0.0)

posix_getsid -- Get the current sid of the process

## Description

``int posix_getsid` (int pid)`

Return the sid of the process `pid`. If `pid` is 0, the sid of the current process is returned.

This is not a POSIX function, but is common on System V systems. If your system does not support this function at system level, this PHP function will always return `FALSE`.

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