Mapping john.webserver.com to http://www.webserver.com/user.php?name=john
is just by changing a few parameters in http.conf file.
<VirtualHost se.rv.er.ip.ad.re.ss>
ServerAdmin [email protected]
DocumentRoot /var/www
ErrorLog /var/log/apache/apache-error.log
TransferLog /var/log/apache/apache.log
ServerName www.servername.com
ServerAlias *.servername.com
RewriteEngine on
RewriteCond %{HTTP_HOST} !^www.* [NC]
RewriteCond %{HTTP_HOST} ^([^\.]+)\.servername\.com
RewriteRule ^/$ http://www.servername.com/user.php?user=%1
</VirtualHost>
The lines for this feature,
RewriteEngine on activating rewrite option
RewriteCond %{HTTP_HOST} !^www.* [NC] the rule will not be applied to subdomain “www”
RewriteCond %{HTTP_HOST} ^([^\.]+)\.servername\.com subdomain section will be our parameter
RewriteRule ^/$ http://www.servername.com/user.php?user=%1 parameter section which is grabbed as subdomain name will be our value for user variable to user.php file.