javaphp
$prize_arr = array(
'0' => array('id'=>1,'prize'=>'平板电脑','v'=>3),
'1' => array('id'=>2,'prize'=>'数码相机','v'=>5),
'2' => array('id'=>3,'prize'=>'音箱设备','v'=>10),
'3' => array('id'=>4,'prize'=>'4G优盘','v'=>12),
'4' => array('id'=>5,'prize'=>'Q币10元','v'=>20),
'5' => array('id'=>6,'prize'=>'下次没准就能中哦','v'=>50),
);
foreach ($prize_arr as $key => $val) {
$arr[$val['id']] = $val['v'];
}
$rid = getRand($arr); /*根据概率获取奖项id*/
$res['msg'] = ($rid==6)?0:1;
$res['prize'] = $prize_arr[$rid-1]['prize']; /*中奖项*/
echo json_encode($res);exit;
/*计算概率*/
function getRand($proArr) {
$result = '';
<code>/*概率数组的总概率精度*/$proSum = array_sum($proArr);/*概率数组循环*/foreach ($proArr as $key => $proCur) { /*相当于每次只能够抽取其中的一个奖项，没抽中就开始抽下一个奖项，直到最后*/ $randNum = mt_rand(1, $proSum); if ($randNum </code>}
?>
