Parse php in .shtml file

[Xallow]

As the title states, I need to parse php in my index.shtml file.

I have tried the following in my .htaccess:

AddType x-mapp-php4 .html .htm .shtml
removeHandler server-parsed shtml

AddType application/x-httpd-php3 .shtml

RemoveHandler .shtml
AddType application/x-httpd-php .shtml

AddType application/x-httpd-php .shtml

With all of them the result is that when I go to the url, I am asked if I want to download the file.

I am at a loss here