Extract include files not working in PHP file

I want to grab a block of html and move it into an include whilst working in a PHP file.

As per the documentation https://www.jetbrains.com/help/phpstorm/editing-html-files.html#javascript_extract_include_file

I select the block of HTML (in a .php file)

But Refactor | Extract | Extract Include File is not available in the menus nor actions.

Surely this should be available within a PHP file. Not just for Javascript.

It's a fairly common thing to do in a .php file to want to move repeated blocks of html into an include??