How to Use Index.Php Instead of Index.Html. The PHP engine lets you create dynamic Web pages. PHP also reads HTML, so you can save an HTML file with a PHP extension and upload the new file to your ...

Another option is:<BR><BR>A .js file which is an inelegant solution but is vanilla-html-workable.<BR><BR>And then you can go to ASP or PHP but those are way over the top for what you need.

One of PHP's strengths is the ability to easily inject variables, values and attributes into HTML code to create dynamic Web pages.