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实例演示分支与循环 流程控制
早晨
Original
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分支与循环演示代码

  1. <?php
  2. namespace _0809;
  3. $score = 70;
  4. // 单分支
  5. echo '-----------------------单分支-----------------------<br>';
  6. if ($score > 60) {
  7.     echo '通过';
  8. }
  10. // 双分支
  11. echo '<br>-----------------------双分支-----------------------<br>';
  12. $score = 50;
  13. if ($score > 60) {
  14.     echo '通过';
  15. } else {
  16.     echo '不通过';
  17. }
  19. // 双分支语法糖
  20. echo '<br>---------------------双分支语法糖------------------<br>';
  21. $score = 90;
  22. echo $score > 60 ? "合格" : "不合格";
  24. // 多分支
  25. echo '<br>-----------------------多分支-----------------------<br>';
  26. if ($score > 60 && $score < 70) {
  27.     echo '成绩为：B';
  28. } elseif ($score > 70 && $score < 80) {
  29.     echo '成绩为：B+';
  30. } elseif ($score > 80 && $score < 100) {
  31.     echo '成绩为：A';
  32. } else {
  33.     echo '成绩为：不合格';
  34. }
  36. // 多分支语法糖：switch
  37. echo '<br>------------------多分支语法糖：switch------------<br>';
  38. switch (true) {
  39.     case $score < 60:
  40.         echo '不满意';
  41.         break;
  42.     case $score > 60 && $score < 70:
  43.         echo '满意';
  44.         break;
  45.     case $score > 80:
  46.         echo '非常满意';
  47.         break;
  48.     default:
  49.         echo '服务太差了';
  50. }
  52. // for循环
  53. echo '<br>-----------------------for循环-----------------------<br>';
  54. $title = ["语文", "数学", "几何", "英语", "地理"];
  55. for ($i = 0; $i < count($title); $i++) {
  56.     if ($i === 1) {
  57.         continue;
  58.     }
  59.     echo $title[$i] . '<br>';
  60. }
  62. // foreach循环
  63. echo '<br>-----------------------foreach循环-----------------------<br>';
  64. foreach ($title as $k => $v) {
  65.     printf('序号：%s ---> 书名：%s<br>', $k, $v);
  66. }
  68. // while循环
  69. echo '<br>-----------------------while循环-----------------------<br>';
  70. $i = 0;
  71. while ($i < count($title)) {
  72.     echo $title[$i] . '<br>';
  73.     $i++;
  74. }

运行效果

流程控制演示代码

  1. <?php
  2. namespace _0809;
  3. $cs = [
  4.     ['id' => '第一节', 'name' => '覃老师', 'sex' => 0, 'course' => '语文'],
  5.     ['id' => '第二节', 'name' => '覃老师', 'sex' => 0, 'course' => '语文'],
  6.     ['id' => '第三节', 'name' => '张老师', 'sex' => 1, 'course' => '数学'],
  7.     ['id' => '第四节', 'name' => '孙老师', 'sex' => 1, 'course' => '几何'],
  8.     ['id' => '第五节', 'name' => '周老师', 'sex' => 1, 'course' => '地理'],
  9.     ['id' => '第六节', 'name' => '孔老师', 'sex' => 0, 'course' => '英语'],
  10.     ['id' => '第七节', 'name' => '赵老师', 'sex' => 1, 'course' => '体育'],
  11.     ['id' => '第八节', 'name' => '马老师', 'sex' => 0, 'course' => '美术'],
  12. ]
  13. ?>
  14. <!DOCTYPE html>
  15. <html lang="zh-CN">
  16. <head>
  17.     <meta charset="UTF-8">
  18.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  19.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  20.     <title>课程表</title>
  21.     <style>
  22.         table {
  23.             border-collapse: collapse;
  24.             width: 360px;
  25.             text-align: center;
  26.         }
  28.         table th,
  29.         table td {
  30.             border: 1px solid #000;
  31.             padding: 5px;
  32.         }
  34.         table caption {
  35.             font-size: 1.3em;
  36.         }
  38.         table thead {
  39.             background-color: lightcyan;
  40.         }
  42.         .active {
  43.             color: red;
  44.         }
  45.     </style>
  46. </head>
  48. <body>
  49.     <table>
  50.         <caption>20班课程表</caption>
  51.         <thead>
  52.             <tr>
  53.                 <th>节名</th>
  54.                 <th>教师</th>
  55.                 <th>性别</th>
  56.                 <th>课程</th>
  57.             </tr>
  58.         </thead>
  59.         <tbody>
  60.             <?php
  61.             foreach ($cs as $cso) : ?>
  62.                 <tr>
  63.                     <td><?= $cso['id'] ?></td>
  64.                     <td><?= $cso['name'] ?></td>
  65.                     <td><?= $cso['sex'] ? '男' : '女' ?></td>
  66.                     <td><?= $cso['course'] ?></td>
  67.                 </tr>
  68.             <?php endforeach ?>
  69.         </tbody>
  70.     </table>
  72. </body>
  73. </html>

运行效果

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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