open_basedir restriction in effect and subdomains - apache

Question

For security reasons I have put my yii folder below the html root, so my structure looks like this
/conf
/httpdocs
/httpsdocs
/yii
when running the site I get an error open_basedir restriction in effect that yii.php which is called by index.php out of httpdocs is not in the allowed path. Because this site is a subdomain do I edit the vhosts.conf of the main domain or of the subdomain?
What would the proper setting be to allow
/var/www/vhosts/example.com/subdomains/mysubdomain/yii
Path to be accessible?
EDIT
So my /var/www/vhosts/example.com/conf/vhost.conf file looks like this now:
AddHandler fcgid-script .php
<Directory /var/www/vhosts/example.com/httpdocs>
php_admin_value open_basedir ".:/var/www/vhosts/example.com/subdomains/mysubdomain/httpdocs:/tmp/:/var/www/vhosts/example.com/subdomains/mysubdomain/yii"
FCGIWrapper /var/www/vhosts/example.com/bin/php-cgi .php
Options +ExecCGI +FollowSymLinks
allow from all
</Directory>
I've reconfigured and restarted the web server but I still get the error:
Warning: require_once() [function.require-once]: open_basedir restriction in effect.
File(/var/www/vhosts/example.com/subdomains/mysubdomain/httpdocs/../yii/yii.php) is not within the allowed path(s):
(/var/www/vhosts/example.com/subdomains/mysubdomain/httpdocs:/tmp)
in /var/www/vhosts/example.com/subdomains/mysubdomain/httpdocs/index.php on line 26

Answer 1

In the virtualhost:
php_admin_value open_basedir ".:/var/www/vhosts/example.com/subdomains/mysubdomain/httpdocs:/my/own/tmp:/var/www/vhosts/example.com/subdomains/mysubdomain/yii"

Answer 2

I found the answer. You have to specify the different modules or else simply editing the vhost file doens't have much of an effect. This is to turn off the open_basedir but you can edit the settings accordingly.
<Directory /var/www/vhosts/YOURDOMAIN.COM/subdomains/YOUSUBDOMAIN/httpdocs>
<IfModule sapi_apache2.c>
php_admin_value open_basedir none
</IfModule>
<IfModule mod_php5.c>
php_admin_value open_basedir none
</IfModule>
</Directory>
then
# /usr/local/psa/admin/bin/websrvmng --reconfigure-vhost --vhost-name=YOURDOMAIN.COM
# apachectl stop
# apachectl start
Full article can be found here: http://prattski.com/2008/09/13/plesk-open_basedir-fix/