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【PHP】双色球实战
可乐随笔
Original
2125 people have browsed it

双色球

1 原理

  1. 红球: 33 选 6
  2. 蓝球: 16 选 1
  3. 取红球: 每取出一个后都要随机打乱,并且排序
  4. 取蓝球: 随机取出一个即可
  5. 中奖号: 6 个红球+1 个蓝球 = 7 个号球
  6. 页面: 用户只需要输入试机号数量即可
  7. 免费用户只能看 10 组, 更多得升级 VIP

2 数组函数

  1. array_rand(): 随机取值,返回值的键名
  2. array_push(): 尾部追加成员
  3. array_splice(): 删除或替换成员
  4. sort(): 排序
  5. array_flip(): 键值交换
  6. array_merge(): 数组合并

3 代码示例:后端

  1. <?php
  3. // 双色球类
  5. define('RED_BALLS', range(1, 33));
  6. define('BLUE_BALLS', range(1, 16));
  8. class DoubleColorBall
  9. {
  10.     //红球
  11.     private static $redBalls = RED_BALLS;
  13.     //篮球
  14.     private static $blueBalls = BLUE_BALLS;
  16.     //选中红球
  17.     private static $electRedBalls = [];
  19.     //选中篮球
  20.     private static $electBlueBalls = [];
  22.     //保存试机号
  23.     private static $testNos = [];
  25.     //从33个红球中选中6个红球
  26.     private static function createRedBalls()
  27.     {
  28.         //循环拿红球
  29.         for ($i = 0; $i < 6; $i++) {
  31.             //1.随机取一个数，返回一个key
  32.             $key = array_rand(self::$redBalls);
  34.             //2.将这个球放入红球数组中
  35.             array_push(self::$electRedBalls, self::$redBalls[$key]);
  37.             //3.将选中的红球从33个红球中剔除
  38.             array_splice(self::$redBalls, $key, 1);
  39.         }
  41.         //排序输出
  42.         sort(self::$electRedBalls, SORT_NUMERIC);
  43.     }
  45.     //从16个篮球中选中1个篮球
  46.     private static function createBlueBalls()
  47.     {
  48.         self::$electBlueBalls = array_rand(array_flip(self::$blueBalls));
  49.         // print_r(self::$electBlueBalls);
  50.     }
  52.     //生成试机号
  53.     private static function createTestNos($n=5)
  54.     {
  55.         for ($i = 0; $i < $n; $i++) {
  57.             self::$redBalls = RED_BALLS;
  58.             self::$blueBalls = BLUE_BALLS;
  59.             self::$electRedBalls = [];
  60.             self::$electBlueBalls = null;
  62.             //生成红球
  63.             self::createRedBalls();
  64.             //生成篮球
  65.             self::createBlueBalls();
  66.             //合并红蓝球成为一个中奖机号
  67.             self::$testNos[] = array_merge(self::$electRedBalls, [self::$electBlueBalls]);
  69.         }
  70.     }
  72.     //获取试机号,供外部调用
  73.     public static function getTestNos($n)
  74.     {
  75.         self::createTestNos($n);
  76.         return self::$testNos;
  77.     }
  78. }
  81. // DoubleColorBall::createRedBalls();
  82. // DoubleColorBall::createBlueBalls();
  83. // print_r(DoubleColorBall::getTestNos(2));
  84. // print_r(DoubleColorBall::$testNos);
  86. $result = DoubleColorBall::getTestNos(5);
  87. echo json_encode($result);

代码示例：前端

  1. <?php
  2. require __DIR__ . '/demo1.php';
  3. // $n = isset($_GET['n']) ? $_GET['n'] : 5;
  4. //null 合并运算符
  5. $n = $_GET['n'] ?? 5;
  6. $allBalls = DoubleColorBall::getTestNos($n);
  7. ?>
  8. <!DOCTYPE html>
  9. <html lang="en">
  11. <head>
  12.     <meta charset="UTF-8">
  13.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  14.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  15.     <title>生成双色球中奖试机号</title>
  16.     <link rel="stylesheet" href="style.css">
  17. </head>
  19. <body>
  21.     <div class="lottery">
  22.         <h2>双色球试机号</h2>
  23.         <form action="">
  24.             <input type="number" name="n" value="<?= $n ?>" onchange="isVip(this)">
  25.             <button>生成试机号</button>
  26.         </form>
  27.         <table>
  28.             <tbody>
  29.                 <?php foreach ($allBalls as $key => $balls) : ?>
  30.                     <tr>
  31.                         <td><?= $key + 1 ?></td>
  32.                         <?php foreach ($balls as $ball) : ?>
  33.                             <td><?= $ball ?></td>
  34.                         <?php endforeach ?>
  35.                     </tr>
  36.                 <?php endforeach ?>
  37.             </tbody>
  38.         </table>
  39.     </div>
  41.     <script>
  42.         function isVip(input){
  43.             if(input.value > 10){
  44.                 alert('免费用户只能看10个,更多请升级VIP!');
  45.                 input.max = 10;
  46.                 input.value = 10;
  47.                 location.reload(true);
  48.                 return false;
  49.             }
  50.         }
  51.     </script>
  52. </body>
  54. </html>

代码示例：异步接口

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.     <title>Document</title>
  8. </head>
  9. <body>
  10.     <button onclick="getData()">获取数据</button>
  12.     <script>
  13.         async function getData(){
  14.             const response = await fetch('demo1.php')
  15.             const data = await response.json()
  16.             console.log(data)
  17.         }
  18.     </script>
  19. </body>
  20. </html>
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