title: Simplest way to get a complete list of all the UTF-8 whitespace characters in PHP
body: <p>In PHP, what's the most elegant way to get the complete list (array of strings) of all the Unicode <a href="http://en.wikipedia.org/wiki/Whitespace_(computer_science)" rel="noreferrer">whitespace characters</a>, encoded in utf8?</p>
  
  <p>I need that to generate test data.</p>