function value($matches) 
{
	global ${$matches[1]};
	if (is_array(${$matches[1]})) return ${$matches[1]}[$matches[2]];
	else return ${$matches[1]};
}
$tpl_main = preg_replace_callback("/<\!--[$](.*)\[(.*)\]-->/" , 'value' , $tpl_main);
$tpl_main = preg_replace_callback("/<\!--[$](.*)-->/" , 'value' , $tpl_main);