Currently on my site I have duplicate URLs as follows:
example.com/post_title/
example.com/post_title_2/
example.com/post_title_33/
I have a canonical url set up in my site's header file that's used on every page as so:
<link rel="canonical" href="<?php echo $url ?>" />
where $url is the page url. So for example if the page URL is example.com/post_title_33/, the canonical is example.com/post_title_33/
My question is what would be the best way to make it so the canonical URL is always example.com/post_title/?
The numbers at the end of the URL can be any number not just 2 or 33 like I used in my example.
You could remove the numbers and leading underscore with preg_replace
:
<?
$input = array(
'example.com/post_title/',
'example.com/post_title_2/',
'example.com/post_title_33/'
);
print_r(preg_replace('/_[0-9]+/', '', $input));
?>
Demo: https://eval.in/63138
Manual: http://us3.php.net/preg_replace
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