title: How to detect if string contains 1 uppercase letter in PHP
body: <p>Couldn't find a function for this.  I'm assuming I need to use regex?  </p>
  
  <p>I'm trying to do html redirects in php in cases where the url contains at least 1 upper case letter.  </p>
  
  <p>example:  <a href="http://www.domain.com/Michael_Jordan" rel="noreferrer">http://www.domain.com/Michael_Jordan</a> needs to be redirected to <a href="http://www.domain.com/michael_jordan" rel="noreferrer">http://www.domain.com/michael_jordan</a> - only problem is I can't seem to find a script to detect if at least 1 capital letter exists.  </p>