title: RegEx Partial string matching
body: <p>Is it possible in PHP Regex to do partial matching so that if I have an array like:</p>
  
  <pre><code>$words = array("john", "steve", "amie", "kristy", "steven");
  </code></pre>
  
  <p>and I supply "jo" it would return "john" or if "eve" is supplied, it returns "steve"?</p>