How to add specific open_basedir to all virtual hosts?

Question

PHP

I want to add "/usr/share/php" to each virtual host in addition to the default value of open_basedir (usually "/var/www/site:.") - here are shared php libraries that should be available to all virtual hosts.
If you write
php_admin_value open_basedir "/usr/share/php"
before the <Directory> and <VirtualHost> sections, it will not give any effect, because redefined within them.
Or it is necessary to add to each virtual host separately?

Answer 1

Specify the path in the php config.

Answer 2

This directive pretty much slows down the site, and in fact it does not provide much protection.