posix_getpid

In order to use posix_getpid on Fedeora 11 and up you have to install php-process# yum install php-process

You can also try using getmypid() instead.

Since upgrading fedora 10 to 12, I discovered that posix_getpid() disappeared and not compiled in by default, as it specifies here.It turns out that it had been moved into package php-process.Just do "yum install php-process", and all should be sweet again.Hope this saves someone half an hour of research.

You can use this code in windows or if you system has no posix support:<?phpif (!function_exists('posix_getpid')) {    function posix_getpid() {        return getmypid();    }}

A fall back function:<?php    function get_current_id() {        if(!function_exists(posix_getpid()))            return getmypid();                return posix_getpid();    }?>