php实现双色球算法

原理就是把已经选过的替换为0
function DoubleBall()
{
$sysBlueball = mt_rand(1,16);
$sysRedball = array(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);
$result = array();
for($i=0; $i<6; $i++)
{
while(true)
{
$index = mt_rand(0,32);
if($sysRedball[$index] != 0)
{
$result[$i] = $sysRedball[$index];
$sysRedball[$index] = 0;
break;
}
}
}
$result = implode(',',$result);
echo '你选择的篮球为：'.$sysBlueball;
echo '你选择的红球为：'.$result;
}