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- <?php
- //计算抽奖的概率
- function get_rand($proArr) {
- $result = '';
- $proSum = array_sum($proArr);
- foreach ($proArr as $key => $proCur) {
- $randNum = mt_rand(1, $proSum);
- if ($randNum <= $proCur) {
- $result = $key;
- break;
- } else {
- $proSum -= $proCur;
- }
- }
- unset ($proArr);
- return $result;
- }
- $prize_arr = array(
- '0' => array('id'=>1,'prize'=>'家电','v'=>2),
- '1' => array('id'=>2,'prize'=>'数码相机','v'=>5),
- '2' => array('id'=>3,'prize'=>'iPad','v'=>13),
- '3' => array('id'=>4,'prize'=>'LED显示器','v'=>15),
- '4' => array('id'=>5,'prize'=>'U盘','v'=>25),
- '5' => array('id'=>6,'prize'=>'键盘','v'=>30),
- '6' => array('id'=>7,'prize'=>'鼠标垫','v'=>10),
- );
- foreach ($prize_arr as $key => $val) {
- $arr[$val['id']] = $val['v'];
- }
- $rid = get_rand($arr);
- $res['yes'] = $prize_arr[$rid-1]['prize'];
- unset($prize_arr[$rid-1]);
- shuffle($prize_arr);
- $prize_arrcount = count($prize_arr);
- for($i=0;$i<$prize_arrcount;$i++){
- $pr[] = $prize_arr[$i]['prize'];
- }
- $res['no'] = $pr;
- //抽奖结果
- $ro = $res['yes'];
- print_r($ro);
- ?>
复制代码
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