posix_getppid

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

posix_getppid — Return the parent process identifier

说明

posix_getppid(): int

Return the process identifier of the parent process of the current process.

参数

此函数没有参数。

返回值

Returns the identifier, as an int.

范例

示例 #1 Example use of posix_getppid()


<?php
echo posix_getppid(); //8259
?>

add a note

User Contributed Notes 4 notes

down

mail at spacerat dot net ¶

4 years ago


answering to http://php.net/manual/en/function.posix-getppid.php#120088

if you're using proc_open and you want to get the pid of the calling php-process, use proc open with usage "exec php $scriptname". In that case, you can get the real parent-id, because php doesn't start a new shell.

down

divinity76 at gmail dot com ¶

5 years ago


WARNING, when using proc_open, your child will NOT get the parent php process's PID by using posix_getppid() , it will actually get the pid of a shell ( /bin/sh ? ) started by php, which in turn starts the child.  i don't currently have a good workaround for this, but i'm working around it by having the parent write it's pid to a file and having the chidren read the file

down

Avital Yachin ¶

4 years ago


posix_getppid will not work on Windows.
Here's an alternative:

<?php
if(strncasecmp(PHP_OS, "win", 3) == 0) {
   $pid = getmypid();  // child process ID
   $parent_pid = shell_exec("wmic process where (processid=$pid) get parentprocessid");
   $parent_pid = explode("\n", $parent_pid);
   $parent_pid = intval($parent_pid[1]);

   echo "Child: $pid  Parent: $parent_pid\n";           
}
?>

down

divinity76 at gmail dot com ¶

5 years ago


when using proc_open, the child's ppid is NOT your php script, but rather a shell started by proc_open's pid. to get your pid, your proc_open child needs to get the parent's parent's (aka grandparent's) pid. here's a way to do that in PHP on linux: 

function posix_getpppid(): int {
    return ( int ) (explode ( " ", file_get_contents ( "/proc/" . posix_getppid () . "/stat" ) ) [3]);
}

(thanks to TML @ irc.freenode.net/##PHP for the technique)

(i said most of this in a previous comment, but i didn't have a good solution for it. now i have. if someone with the privileges read this, can you delete this notice and my previous comment please?)

add a note

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

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 PHP7添加redis扩展 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP获取指定函数定义在哪个文件中及行号 PHP mkdir()写出来的权限与mode值不符合 adodb连接mysql多个数据库的问题利用PHP SOAP实现WEB SERVICE PHPstorm 里面Terminal 不能使用 esc键吗退出编辑模式吗

略微加速

PHP官方手册 - 互联网笔记

posix_getppid

说明

参数

返回值

范例

User Contributed Notes 4 notes