title: Is it possible to use SplEnum in php 5.2.6?
body: <p>I tried to use class :</p>
  
  <pre><code>abstract class my_abstractEnum extends SplEnum {
  ...
  }
  </code></pre>
  
  <p>and</p>
  
  <pre><code>class my_categoryEnum extends my_abstractEnum {
  ...
  }
  </code></pre>
  
  <p>and I have :</p>
  
  <blockquote>
    <p>Fatal error: Class 'SplEnum' not found</p>
  </blockquote>
  
  <p>I work on PHP 5.2.6.
  SplEnum is for php > 5.3 ? I don't see so in the documentation ...</p>