I agree with placing PHP (server-side) custom code within HTML (i.e. tags ‘<?php’ and ‘?>’ are considered as commented code); however the actual parsing of PHP should be handled when the site is exported to a document folder associated with a PHP configured development or production web server, not within the BTS working canvas or BTS browser preview.
could you include any sequence to insert content of the file – similar to php funkction include();?
For example I wil have a file header.html where i have header code and i will insert this content to any page – index, about us, contact … The same with footer.html.
This is a powerful feature which allows you to synchronize components,
so changing one will automatically change the other. This is
especially useful for things like headers and footers which you need
to update across pages.