javaphp
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) {
$result = '';
/*概率数组的总概率精度*/$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
}
?>