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PHP - Manual: posix_setsid - 互联网笔记

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PHP官方手册 - 互联网笔记

PHP - Manual: posix_setsid

2025-05-08

posix_setsid

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

posix_setsidMake the current process a session leader

说明

posix_setsid(): int

Make the current process a session leader.

参数

此函数没有参数。

返回值

Returns the session id, or -1 on errors.

参见

  • 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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karlsson dot nicklas at gmail dot com
17 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);
}
}
?>

官方地址:https://www.php.net/manual/en/function.posix-setsid.php

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