<VirtualHost 192.168.0.20>
ServerAdmin admin@testdomain.com
DocumentRoot /var/www/testdomain.com
ServerName testdomain.com
ServerAlias www.testdomain.com
# ErrorLog /var/log/apache/testdomain.com.ErrorLog
CustomLog /var/log/apache/testdomain.com.Combined combined
php_admin_flag engine off
</VirtualHost>

po nadolu:

<Directory /hda4/webUsers/testdomain.com/user1files>
php_admin_value engine off
</Directory>

и след това като изпълня:
apachectl configtest
Syntax error on line 1084 of /etc/apache/httpd.conf:
Invalid command 'php_admin_flag', perhaps mis-spelled or defined by a module not included in the server configuration

това е реда в секцията на виртуалния хост - php_admin_flag engine off

нещо не правя както трябва.