title: PHP's strtotime in Objective C/iPhone
body: <p>Is there an equivalent (or vaguely similar) to PHP's strtotime in Objective C/iPhone?</p>
  
  <p>strtotime can for example understand the below time expressions (from the php documentation):</p>
  
  <ul>
  <li>echo strtotime("now"), "\n";</li>
  <li>echo strtotime("10 September 2000"), "\n";</li>
  <li>echo strtotime("+1 day"), "\n";</li>
  <li>echo strtotime("+1 week"), "\n";</li>
  <li>echo strtotime("+1 week 2 days 4 hours 2 seconds"), "\n";</li>
  <li>echo strtotime("next Thursday"), "\n";</li>
  <li>echo strtotime("last Monday"), "\n";</li>
  </ul>