<?
class Log
{
    function loguj()
    {

        $args = func_get_args();
        $vystup = call_user_func_array("sprintf", $args);
        echo   $vystup;

    }
}
 $log = new Log;
$log->loguj("kjkhjkhjkgjkg");
$log->loguj("<br>kjkhjkhfgdfgfdjkgjkg");