Overview

Server Side Includes (SSI) is a simple interpreted server-side scripting language used almost exclusively for the Internet. The most frequent use of SSI is to include the contents of one or more files into a web page on a web server.

SSI doesn't seem to be working. How can I determine what the problem is?

Solution

1. Make sure that SSI is enabled for the domain within the Plesk interface. This can be  enabled/disabled within the domain's physical hosting screen.
2. Make sure that the file has the proper extension (by default):

   
   .shtml

3. Make sure that the file has the proper ownership. The owner should be domain_ftp_user and the group should be psacln.
4. The apache configuration file httpd.conf should contains the lines:

   
   AddType text/html .shtml
   AddOutputFilter INCLUDES .shtml
   

5. Look in the domain's Apache error_log file at /var/www/vhosts/mt-example.com/statistic/logs/ for more information.