Weblabor

<?
function sz() {
  $d=rand(0,2);
  switch ($d) {
    case 0:
        return and;
        break;
    case 1:
        return or;
        break;
	case 2:
        return xor;
        break;
  }
  }
  $a=rand(0,1);$b=rand(0,1);$c=rand(0,1);
  print $a sz() ($b sz() $c) sz() !$b;
?>

<?
$c='';
function sz($x, $y) { global $c;
  $d=rand(0,2);
  switch ($d) {
    case 0:
		$c.='$a and $b';
        return $x and $y;
        break;
    case 1:
		$c.='$a or $b';
        return $x or $y;
        break;
	case 2:
		$c.='$a xor $b';
        return $x xor $y;
        break;
  }
  }
  $a=rand(0,1);$b=rand(0,1);
  print "Ha a= ".$a." b= ".$b."<br/>";
  $d=sz($a,$b); 
  print $c.'  ='.$d; 
?>