PHP/Class/self

Use self to reference static class properties

   <source lang="html4strict">

<?php

  class visitors
  {
     private static $visitors = 0;
     function __construct()
     {
        self::$visitors++;
     }
     static function getVisitors()
     {
        return self::$visitors;
     }
  }
  $visits = new visitors();
  echo visitors::getVisitors()."
";
  $visits2 = new visitors();
  echo visitors::getVisitors()."
";

?>

      </source>