flatpress/fp-includes/smarty-4.1.0/docs/programmers/api-variables/variable-direct-access-security.md

$direct_access_security

Direct access security inhibits direct browser access to compiled or cached template files.

Direct access security is enabled by default. To disable it set $direct_access_security to FALSE.

Note

This is a compile time option. If you change the setting you must make sure that the templates get recompiled.