How to implement the php lucky wheel code

php How to implement the Lucky Wheel: 1. Create a PHP sample file; 2. Implement the Lucky Wheel lottery algorithm through the code "function get_gift(){...}".

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

How to implement the php lucky wheel code?

PHP implements the big carousel lottery algorithm

Code:

 function get_gift(){  
        //拼装奖项数组 
        // 奖项id，奖品，概率
        $prize_arr = array(   
          '0' => array('id'=>1,'prize'=>'平板电脑','v'=>0),   
          '1' => array('id'=>2,'prize'=>'数码相机','v'=>1),   
          '2' => array('id'=>3,'prize'=>'音箱设备','v'=>1),   
          '3' => array('id'=>4,'prize'=>'4G优盘','v'=>1),   
          '4' => array('id'=>5,'prize'=>'10Q币','v'=>1),   
          '5' => array('id'=>6,'prize'=>'空奖','v'=>6),   
        );   
        foreach ($prize_arr as $key => $val) {   
          $arr[$val['id']] = $val['v'];//概率数组   
        }    
        $rid = get_rand($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;$i<count($prize_arr);$i++){   
          $pr[] = $prize_arr[$i][&#39;prize&#39;];  //未中奖项数组 
        }   
        $res[&#39;no&#39;] = $pr; 
        // var_dump($res);
 
          
        if($res[&#39;yes&#39;]!=&#39;空奖&#39;){  
            $result[&#39;status&#39;]=1;  
            $result[&#39;name&#39;]=$res[&#39;yes&#39;];  
        }else{  
            $result[&#39;status&#39;]=-1;  
            $result[&#39;msg&#39;]=$res[&#39;yes&#39;];  
        }   
        //return $result;  
        var_dump($result);
    }  
 
    //计算中奖概率
    function get_rand($proArr) {   
      $result = &#39;&#39;;   
      //概率数组的总概率精度   
      $proSum = array_sum($proArr);   
      // var_dump($proSum);
      //概率数组循环   
      foreach ($proArr as $key => $proCur) {   
        $randNum = mt_rand(1, $proSum);  //返回随机整数 
 
        if ($randNum <= $proCur) {   
          $result = $key;   
          break;   
        } else {   
          $proSum -= $proCur;   
        }   
      }   
      unset ($proArr);   
      return $result;   
    }
    get_gift();

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