PHP example code to achieve winning

This article mainly shares with you the example code of php to achieve winning, hoping to help everyone.

<?php 
//设置中奖概率


     $prize_arr = array(
  
      0=>array( &#39;id&#39;=>1,&#39;prize&#39;=>&#39;现金500W&#39;,&#39;v&#39;=>1 ), //概率为1/200
      1=>array( &#39;id&#39;=>2,&#39;prize&#39;=>&#39;iphone7&#39;,&#39;v&#39;=>5 ),  
      2=>array( &#39;id&#39;=>3,&#39;prize&#39;=>&#39;耐克跑鞋&#39;,&#39;v&#39;=>10 ),
      3=>array( &#39;id&#39;=>4,&#39;prize&#39;=>&#39;魔声耳机&#39;,&#39;v&#39;=>24 ),
      4=>array( &#39;id&#39;=>5,&#39;prize&#39;=>&#39;蓝牙音响&#39;,&#39;v&#39;=>60 ),
      5=>array( &#39;id&#39;=>6,&#39;prize&#39;=>&#39;现金1元&#39;,&#39;v&#39;=>100000 )
    );
 /*
16  * 对数组进行处理
17  */


foreach( $prize_arr as $k => $v ){
     //使用新数组item
    $item[$v[&#39;id&#39;]] = $v[&#39;v&#39;]; 
    
}
function get_rand($item){
     $num = array_sum($item);//计算出分母200
     foreach( $item as $k => $v ){
       $rand = mt_rand(1, $num);//概率区间(整数) 包括1和200
      /*
43        *这个算法很666 
44        */
      if( $rand <= $v ){
           //循环遍历,当下标$k = 1的时候，只有$rand = 1 才能中奖 
           $result = $k;
          echo $rand.&#39;--&#39;.$v;
          break;
      }else{
           //当下标$k=6的时候，如果$rand>100 必须$rand < = 100 才能中奖 ，那么前面5次循环之后$rand的概率区间= 200-1-5-10-24-60 （1,100） 必中1块钱
          $num-=$v;
          echo &#39;*&#39;.$rand.&#39;*&#39;."&ensp;"."&ensp;"."&ensp;";
       }
     }
     return $result;
 }
 var_dump(get_rand($item));
 ?>

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