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posix_setgid	posix_setrlimit

POSIX Functions	Last updated: Mon, 26 Oct 2026

posix_setpgid

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_setpgid — Set process group id for job control

Description

function posix_setpgid(int $process_id, int $process_group_id): bool

Let the process process_id join the process group process_group_id.

Parameters

process_id: The process id.
process_group_id: The process group id.

Return Values

Returns true on success or false on failure.

Changelog

Version	Description
8.5.0	Now throws a ValueError when `process_id` or `process_group_id` is lower than zero or greater than what the platform supports.

See Also

See POSIX.1 and the setsid(2) manual page on the POSIX system for more information on process groups and job control.

posix_setgid	posix_setrlimit

POSIX Functions	Last updated: Mon, 26 Oct 2026