Automatically link Twitter Usernames
<?php
function ccd_twt_replace( $content ) {
$twtreplace = preg_replace( '/([^a-zA-Z0-9-_&])@([0-9a-zA-Z_]+)/', "$1<a href=\"http://twitter.com/$2\" target=\"_blank\" rel=\"nofollow\">@$2</a>", $content );
return $twtreplace;
}
add_filter( 'the_content', 'ccd_twt_replace' );
add_filter( 'comment_text', 'ccd_twt_replace' );
?>
WordPress Snippet