How to add canonical tag to every page in website by PHP

by: myfreeonlinetoolsPosted on:

PHP two line codes add Canonical tag in website every page

Add canonical tag dynamically by using PHP code easily with two lines of code. Canonical tag using on a webpage that tells search engines that specific URL represents the master copy not having any duplicate page.  Using canonical tag shows duplicate content present on different or multiple URLs.

 

<?php
$actual_link = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'];

?>

<link rel="canonical" href="<?php echo dirname($actual_link).'/'; ?>" />