title: Regex modification php
body: <p>I have this regex: <code>/\*([^&lt;|\n|\r]+)/</code></p>
  
  <p>which matches all characters in a string starting with a * and ending in a new line or a '&lt;', how can I modify this regex to not match strings if they start with a ** (so it will not match if the second character is also a *)</p>