When I installed Symfony2 sandbox and try to check requirements by check.php I had 2 problems. My server don't have posix and intl extensions. I'm using WampServer 2.1e (32 bits) on Windows 7 32bit so my versions of apache and php are: Apache 2.2.17 VC6 ThreadSafe Php 5.3.5
I was trying to apply intl extension from http://windows.php.net/downloads/releases/php-5.3.5-Win32-VC6-x86.zip but i have weird error in apache log: "Can't find extension in c:/wamp/..." I'm sure that extension is in correct directory and enabled in php.ini.
With posix extension I have bigger problem. I can't find it at all on windows platform. In documentation of php it is said that it should be enabled by default, but it isn't.
I'm using XAMPP 1.7.4 with PHP 5.3.5 and i experience the same problems.
The problem concerning intl extension i solved this way: i copied files named icu*36.dll from php installation folder to C:\Windows
Resorurces for intl: http://www.tiv.net/2010/12/php-intl-extension-windows-apache.html
Talking about the posix issue, i haven't even searched, becase this extension is used to colorize the CLI output and Windows shell isn't able to do it.
来源：https://stackoverflow.com/questions/4741396/posix-and-intl-extension-on-windows