Parallelepiped

Is possible create a parallelepiped from high,and wides?
$xc = $sender->getX();
$yc = $sender->getY();
$zc = $sender->getZ();
$l = $args[0]/2;
$l2 = $args[1]/2;
$h = $args[2]/2;
$level = $sender->getLevel();
for($x = $xc - $l; $x <= $xc + $l; $x++) {
for($y = $yc - $l2; $y <= $yc + $l2; $y++) {
for($z = $zc - $h; $z <= $zc + $h; $z++) {
}
}
}
I have tried the same code of a cube , but i do not understand why $h became the wides , and $l2 the $h ....