Case Analysis of Implementing Roulette Lottery Algorithm Using PHP

This time I will bring you a case analysis of using PHP to implement the carousel lottery algorithm. What are the precautions for using PHP to implement the carousel lottery algorithm. The following is a practical case, let's take a look.

Process:

1.Assemble the awardArray

2.Calculate the probability

3.Return The winning situation

The code is as follows:

The winning probability ' v ' can be set in the background and passed to this method, NotePassing Integer

function get_gift(){ 
    //拼装奖项数组 
    // 奖项id，奖品，概率
    $prize_arr = array(  
     '0' => array('id'=>1,'prize'=>'平板电脑','v'=>0),  
     '1' => array('id'=>2,'prize'=>'数码相机','v'=>0),  
     '2' => array('id'=>3,'prize'=>'音箱设备','v'=>0),  
     '3' => array('id'=>4,'prize'=>'4G优盘','v'=>5),  
     '4' => array('id'=>5,'prize'=>'10Q币','v'=>0),  
     '5' => array('id'=>6,'prize'=>'空奖','v'=>5),  
    );  
    foreach ($prize_arr as $key => $val) {  
     $arr[$val['id']] = $val['v'];//概率数组  
    }  
    $rid = $this->get_rand($arr); //根据概率获取奖项id  
    $res['yes'] = $prize_arr[$rid-1]['prize']; //中奖项  
    unset($prize_arr[$rid-1]); //将中奖项从数组中剔除，剩下未中奖项  
    shuffle($prize_arr); //打乱数组顺序  
    for($i=0;$i<count> $proCur) {  
    $randNum = mt_rand(1, $proSum); //返回随机整数 
    if ($randNum <p style="text-align: left;">Rendering: </p>
<p style="text-align: left;"><img src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/061/021/758adb889cfe76140bb0fb1640aac021-0.png?x-oss-process=image/resize,p_40" class="lazy" alt=""><img src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/061/021/758adb889cfe76140bb0fb1640aac021-1.png?x-oss-process=image/resize,p_40" class="lazy" alt=""></p>
<p style="text-align: left;"> I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to php Chinese Other related articles online! </p>
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