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);
}
}
?>
posix_setsid
(PHP 4, PHP 5, PHP 7, PHP 8)
posix_setsid — 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
karlsson dot nicklas at gmail dot com ¶
16 years ago
