<?php
$dir = 'classes/';
if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        while (($file = readdir($dh)) !== false) {
            if($file != '.' && $file != '..' && !is_dir($dir.$file)){
                require_once($dir.$file);
            }
        }
        closedir($dh);
    }
}
// SNIP
// some unrelated code such as DB connectors appeared here
// /SNIP
$classes = get_declared_classes();
foreach($classes as $class){
    if(substr($class,0,3)=='SYS'){
        $class2 = str_replace('SYS','',$class);
        eval('$'.strtolower($class2).' = new '.$class.'();');
    }
}