Didsbury Design Blog » regular expressions http://blog.didsburydesign.com Web Design and Development Fri, 04 Nov 2011 16:37:21 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 How to: detect URLs in text and convert to html links (PHP using regular expressions) http://blog.didsburydesign.com/2009/10/how-to-detect-urls-in-text-and-convert-to-html-links-php-using-regular-expressions/ http://blog.didsburydesign.com/2009/10/how-to-detect-urls-in-text-and-convert-to-html-links-php-using-regular-expressions/#comments Wed, 14 Oct 2009 21:53:26 +0000 Didsbury Design http://blog.zero7ict.com/?p=112 I was trying to find a way of picking up URLs from user’s posts and converting them to HTML links. I found a few examples on the net that didn’t work for multiple URLs so I thought i would post a simple solution.

I have used the PHP preg_replace function

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<?php
// The Regular Expression filter
$pattern = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
 
//example text
$text="Example user text with a URL http://www.zero7web.com , second link http://www.didsburydesign.co.uk";
// convert URLs into Links
$text= preg_replace($pattern, "<a href=\"\\0\"?phpMyAdmin=uMSzDU7o3aUDmXyBqXX6JVQaIO3&phpMyAdmin=8d6c4cc61727t4d965138r21cd rel=\"nofollow\">\\0</a>", $text);
 
echo $text;
?>

This will match all the URL’s in the text and not just the first one like so many of the example on the web seem to do!!

I will post a C# .net version of this as a follow up in the next day or so.

All comments welcome.

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