title: Regex replace one or two letter words
body: <p>I am trying to replace one or two letters in a string. Please consider this regex</p>
  
  <pre><code>$str = 'I haven\'t got much time to spend!';
  echo preg_replace('/\b([a-z0-9]{1,2})\b/i','',$str);
  
  returns: haven' got much time spend!
  expected output: haven't got much time spend!
  </code></pre>
  
  <p>My goal is remove any one or two characters length words from a string. This can be alphanumeric or special characters.</p>