title: Problems with simple preg_replace + RegEx
body: <p>Please pardon the fact that I am a complete newbie to RegEx, and have not really used preg_replace before.</p>
  
  <p>I'm trying to take a string and replace any occurrences of "(username) said:" with "@(username)\n". Since usernames can only have spaces, letters, and numbers, I used [A-Za-z0-9\s]. However, it isn't working, and I know I did something wrong:</p>
  
  <p><code>$message = preg_replace("/([A-Za-z0-9\s]*) said:", "@$0\n", $message);</code></p>
  
  <p>Is this the proper way to use preg_replace, or is there a different way I should be going about this?</p>