Configuring Vitualhost in apache (Plesk)

 forwarding sub-domain to hosting server(IP).
create dns record in domain section like xxx.domain.com pointing to IP by following the link.
http://sdevaraju.blogspot.in/2014/07/a-step-by-step-guide-on-how-to-create.html

 <VirtualHost x.x.x.x:80>
  ServerName "domain/sub-domain"
  DocumentRoot "path-to site/test"
ScriptAlias  "/cgi-bin/" "path-to site/cgi-bin/"
<IfModule mod_fcgid.c>
    <Files ~ (\.php)>
        SetHandler fcgid-script
        FCGIWrapper /var/www/cgi-bin/cgi_wrapper/cgi_wrapper .php
        Options +ExecCGI
        allow from all
    </Files>
</IfModule>
</VirtualHost>