php大转盘抽奖

抽奖大转盘演示：http://www.sucaihuo.com/php/3301.html
function getRand($proArr, $proCount) {
    $result = '';
    $proSum = 0;
    foreach ($proCount as $key => $val) {
        if ($val <= 0) {
            continue;
        } else {
            $proSum = $proSum + $proArr[$key];
        }
    }
    foreach ($proArr as $key => $proCur) {
        if ($proCount[$key] <= 0) {
            continue;
        } else {
            $randNum = mt_rand(1, $proSum);
            if ($randNum <= $proCur) {
                $result = $key;
                break;
            } else {
                $proSum -= $proCur;
            }
        }
    }
    unset($proArr);
    return $result;
}

$prizes = array(
        0 => array(
            "id" => 0, //中奖id
            "name" => "谢谢参与", //奖品名称
            "count" => "100", //库存
        ),
        1 => array(
            "id" => 1,
            "name" => "罗浮山门票",
            "count" => "40",
        ),
        2 => array(
            "id" => 2,
            "name" => "罗浮山嘉宝田温泉体验券",
            "count" => "40",
        ),
        3 => array(
            "id" => 3,
            "name" => "精美旅游书籍《山水酿惠州》",
            "count" => "40",
        ),
        4 => array(
            "id" => 4,
            "name" => "碧海湾漂流门票",
            "count" => "40",
        ),
        5 => array(
            "id" => 5,
            "name" => "南昆山门票",
            "count" => "40",
        ),
        6 => array(
            "id" => 6,
            "name" => "云顶温泉精美礼品",
            "count" => "40",
        ),
    );