The include (or require) statement takes all the text/code/markup that exists in the specified file and copies it into the file that uses the include statement.
Including files is very useful when you want to include the same PHP, HTML, or text on multiple pages of a website.
PHP include Examples
Example
Assume we have a standard footer file called "footer.php", that looks like this:
<?php
echo "<p>Copyright © 1999-" . date("Y") . " W3Schools.com</p>";
?>
To include the footer file in a page, use the include statement:
Example
<html>
<body>
<h1>Welcome to my home page!</h1>
<p>Some text.</p>
<p>Some more text.</p>
<?php include 'footer.php';?>
</body>
</html>
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