Alias /myadmin /usr/share/phpMyAdmin
<Directory "/usr/share/phpMyAdmin">
+ Options FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
+ php_admin_value open_basedir "/etc/webapps/phpMyAdmin/:/usr/share/phpMyAdmin/:/usr/share/phpMyAdmin/css/..:/tmp"
</Directory>