posix_setsid

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

posix_setsidMake the current process a session leader

Description

posix_setsid(): int

Make the current process a session leader.

Parameters

This function has no parameters.

Return Values

Returns the session id, or -1 on errors.

See Also

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

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User Contributed Notes 1 note

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5
karlsson dot nicklas at gmail dot com
16 years ago
Very useful when making daemons, for example:

<?php
$pid
= pcntl_fork(); // fork
if ($pid < 0)
exit;
else if (
$pid) // parent
exit;
else {
// child

$sid = posix_setsid();

if (
$sid < 0)
exit;

for(
$i = 0; $i <= 60; $i++) { // do something for 5 minutes
sleep(5);
}
}
?>
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