Properly parse tweets using PHP.

Tweet Parser

function parse($tweet)
{
	$regex = array
	(
		'#([a-z]{3,9}://[a-z0-9-_./\\\?&\+]*)#i',
		'#[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,6}#i',
		'#@([a-z0-9-_]+)#i',
		'#\#([a-z0-9-_]+)#i'
	);

	$replace = array
	(
		'<a href="$0" target="_blank">$0</a>',
		'<a href="mailto:$0">$0</a>',
		'<a href="http://twitter.com/$1" target="_blank">$0</a>',
		'<a href="http://twitter.com/search?q=%23$1" target="_blank">$0</a>'
	);

	return preg_replace($regex, $replace, $tweet);
}