離題一下...如果用PHP這樣寫，機率是否會跟實際的樂透理論一樣?

$ball=array(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36);
unset($ball[0]);
for($c=0;$c<=5;$c++){
$keys=array_rand($ball,1);
unset($ball[$keys]);
print $keys."\n";
}