Centos – Can’t load driver file apr_dbd_thesql.so when restarting Apache

This may be for the following problems #

• Your copy of mod_wsgi is compiler against a different version of python than what you have.
• Your copy of libpython shared object file isn't in apache's library path

Following links may help you #

• googlecode
• serverfault
• kunclehead

You cannot just copy modules from /usr/lib64/php/modules/ to /usr/lib64/php-zts/modules/ — ZTS (threaded) and non-ZTS builds of PHP have different module ABI.

Apparently the php-pecl-memcache package for Fedora 18 and even the Rawhide package are built without ZTS support, so they are not usable with mod_php in a threaded Apache MPM.

You have several options here:

1. According to the recommendation in the PHP FAQ, the most reliable way to use PHP together with a threaded Apache MPM is the FastCGI mode (e.g., with php-fpm), so that PHP will run in separate single-threaded processes. This way you can use all available PHP extensions — even those which use non-threadsafe libraries and cannot work in a multithreaded process at all.

2. If you really need to use mod_php with a threaded MPM, you can use third-party packages (like this) which are built with php-zts support (notice that /usr/lib64/php-zts/modules/memcache.so is present in the file list).

3. If you cannot find a ready-made binary package with php-zts support for a PHP extension you need, you can try to rebuild the package yourself, but even this may not be possible if the extension in question does not have ZTS support in its code.