/*
* 抽奖
* @return bool
*/
// $prize_arr = array(
// ‘0‘ => array(‘id‘=>1,‘prize‘=>‘平板
电脑‘,‘v‘=>1),
// ‘1‘ => array(‘id‘=>2,‘prize‘=>‘数码相机‘,‘v‘=>5),
// ‘2‘ => array(‘id‘=>3,‘prize‘=>‘
音箱设备‘,‘v‘=>10),
// ‘3‘ => array(‘id‘=>4,‘prize‘=>‘4G
优盘‘,‘v‘=>12),
// ‘4‘ => array(‘id‘=>5,‘prize‘=>‘10Q币‘,‘v‘=>22),
// ‘5‘ => array(‘id‘=>6,‘prize‘=>‘下次没准就能中哦‘,‘v‘=>50),
// );
function get_rand($proArr)
{
$result = array();
for
each ($proArr as $key => $val) {
$arr[$key] = $val[‘v‘];
}
// 概率数组的总概率
$proSum = array_sum($arr);
// 概率数组循环
foreach ($arr as $k => $v) {
if ($randNum <= $v) {
$result = $proArr[$k];
} else {
$proSum -= $v;
}
}
unset($proArr);
return $result;
}