I would like to adjust PHP settings for one of my virtual hosts. When I try to use php_flag magic_quotes_gpc off in additional Apache directives - it does not work. I can save this directive, but when I later look into virtual host configuration in /etc/apache2/vhosts/Vhosts_ispconfig.conf, there is no php_flag added for this virtual host. There exists file Vhosts_ispconfig.conf_DATETIME with date and time of saving directive in user interface of ISPConfig, but resulting configuration file is stripped off and my directives are not included in it. What is the correct way to change settings of PHP settings for whole virtual host and also only for some subdirectory of given virtual host?