Quickly add hyperlinks to mentions and hashtags on tweets using PHP

add-twitter-links.php

<?php

	function add_twitter_links ($string)
	{
		$string = preg_replace(array
		(
			"#(^|[\n ])([\w]+?://[\w]+[^ \"\n\r\t< ]*)#",
			"#(^|[\n ])((www|ftp)\.[^ \"\t\n\r< ]*)#",
			"/@(\w+)/",
			"/#(\w+)/"
		), array
		(
			"\\1<a href=\"\\2\" target=\"_blank\">\\2</a>",
			"\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>",
			"<a href=\"https://twitter.com/\\1\" target=\"_blank\">@\\1</a>",
			"<a href=\"https://twitter.com/search?q=\\1\" target=\"_blank\">#\\1</a>"
		), $string);
		return $string;
	}

	echo add_twitter_links ("Heyo @guimadaleno, wazzup? Let's go drink a beer? #dontsayno");

?>