I\'m new to html and was wondering if there is a way to apply the same content to many html files at once.
For example, if I have many pages, but all those pages hav
<?php
include(file with extension);
?>
You'd have to change your file extension that runs this code to DOT php
You can write the common content in javascript file and include it in your html pages using script tag:
<script src="YOUR_FILE.js"></script>
You can use an online HTML to Javascript converter like this one to generate you javascript code.
Server-side includes or server-side programming languages (like PHP, for example), are often used to do that. All pages just include a shared common file, which contains the common content.
You can use PHP to do that. Write the HTML code in PHP file, then add include statement in your HTML. This saves you from having to write same code again and again specially for navigation, etc.
PHP manual explains it.
Hope it helps.