In this article, you will learn how to use require_once keyword to include external PHP script file in your code.
The require_once keyword in PHP is used to embed PHP code from another file. If the file is not found, a fatal error is thrown and the program stops. If the file was already included previously, this statement will not include it again.
examples of the REQUIRE_Once function
Example 1. In this example, we use require_once to add a footer to a page.
<!DOCTYPE html>
<html>
<body>
<h1>Welcome to my home page!</h1>
<p>Some text.</p>
<p>Some more text.</p>
<?php require_once 'footer.php';?>
</body>
</html>
