I need to include a header file in some HTML pages. However, I have an issue with these .html pages not working when converted to .php files. I do not know why this is. The files are from a script purchased from Themeforest who no longer support the product.
What I would like to know is, can I include other HTML files within another HTML file?
I have found this:
But wondered if this is the correct way about it, or if there are better ways?
Any advice would be great, thanks!