PHP简单的微信大转盘完整版，含前后端数据处理

/**
 * $proArr = array('1'=>'概率', '2'=>'概率');
 * $proCount = array('1'=>'库存', '2'=>'库存');
 */
function getRand($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;
}