andr3w.net » twitter http://andr3w.net amateur web development... Fri, 20 Aug 2010 21:08:03 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Hashtag and Username Linking in Twitter Apps http://andr3w.net/2009/05/hashtag-and-username-linking-in-twitter-apps/ http://andr3w.net/2009/05/hashtag-and-username-linking-in-twitter-apps/#comments Tue, 12 May 2009 23:44:50 +0000 Andrew http://andr3w.net/?p=151 Are you trying to add automatic hashtag and username hot linking in your PHP twitter app?

I just tried to do this with my amdavidson.me lifestreaming site. It’s just two nested regular expressions. If there’s some problem with nested preg_replace functions, or if any regular expression geniuses have better ideas, feel free to comment.

But if not, here’s a little code for you, should make things super easy. It assumes your tweet variable is $tweet, replace with whatever you’d need.

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echo preg_replace('/\#([a-zA-Z0-9_]{1,15})?/',
"<a href=\"http://hashtags.org/tag/$1\">#$1</a>",
preg_replace('/\@([a-zA-Z0-9_]{1,15})?/',
"<a href=\"http://twitter.com/$1\">@$1</a>",
$tweet));
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