Using Plesk SDK API, an extension can make changes to the web server
configuration.

• Class
  pm_Hook_WebServer
  allows to describe custom directives for domains to be added to the
  configuration files.
• Class
  pm_WebServer
  is used to instruct the web server to update the configuration for
  the specified domain.

Adding Custom Configuration

The following methods of the class
pm_Hook_WebServer
are used to describe custom directives introduced by the extension into
the web server configuration files:

• getDomainApacheConfig(pm_Domain $domain) - returns the string
  which will be added to the Apache configuration as a
  <VirtualHost></VirtualHost> custom directive.
• getDomainNginxConfig(pm_Domain $domain) - returns the string
  which will be added to nginx configuration as a {...} custom
  directive when nginx is used as the main web server.
• getDomainNginxProxyConfig((pm_Domain $domain) - returns the
  string which will be added to nginx configuration as a {...}
  custom directive when nginx is used in proxy mode.
• getDomainIisConfig(pm_Domain $domain) - returns XML as a string
  which will be added to the Plesk IIS configurator.

Every time a domain is reconfigured, these methods will be called.

class Modules_WebServer_WebServer extends pm_Hook_WebServer
{
    public function getDomainApacheConfig(pm_Domain $domain)
    {
        return '# Apache config for domain: ' . $domain->getName();
    }
    public function getDomainNginxConfig(pm_Domain $domain)
    {
        return '# Nginx config for domain name: ' . $domain->getName();
    }
}

Updating Domain Configuration

Method
pm_WebServer::updateDomainConfiguration()
is used to immediately update the specified domain configuration. For
example, this can be done when some additional service was activated on
that domain by the extension.

$webServerManager = new pm_WebServer();
$webServerManager->updateDomainConfiguration(new pm_Domain(1));