2.14.3.8. Configure HTTPS in OpenCart

1. Check if an SSL certificate is installed in SSL settings. If the certificate is not installed, install it.
2. Edit two configuration files:
   1. In the config.php file located in the site root directory, find the line with the HTTPS_SERVER parameter:

      // HTTPS
      define('HTTPS_SERVER', 'http://example.com/');

      In the address specified in it, replace HTTP with HTTPS so that it looks as follows:

      // HTTPS
      define('HTTPS_SERVER', 'https://example.com/');

   2. In the config.php file in the admin directory, find lines with HTTPS_SERVER and HTTPS_CATALOG parameters:

      // HTTPS
      define('HTTPS_SERVER', 'http://example.com/admin/');
      define('HTTPS_CATALOG', 'http://example.com/');

      Replace HTTP with HTTPS in the addresses specified in them so that they look as follows:

      // HTTPS
      define('HTTPS_SERVER', 'https://example.com/admin/');
      define('HTTPS_CATALOG', 'https://example.com/');

3. Enable SSL support in the admin panel of the site itself:
   1. Open the site admin panel.
   2. Go to "System → Settings".
   3. To the right of the store name, click "Edit".
   4. Switch to the "Server" tab.
   5. Next to "Use SSL", select "Yes".
   6. Save changes by clicking "Save" in the upper-right corner of the page.
4. Enable redirect to HTTPS.
5. Check the site operation.

In most cases, the actions described above are sufficient to enable HTTPS on your site.