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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. }
  9. // 双分支
  10. echo '<br>-----------------------双分支-----------------------<br>';
  11. $score = 50;
  12. if ($score > 60) {
  13. echo '通过';
  14. } else {
  15. echo '不通过';
  16. }
  17. // 双分支语法糖
  18. echo '<br>---------------------双分支语法糖------------------<br>';
  19. $score = 90;
  20. echo $score > 60 ? "合格" : "不合格";
  21. // 多分支
  22. echo '<br>-----------------------多分支-----------------------<br>';
  23. if ($score > 60 && $score < 70) {
  24. echo '成绩为:B';
  25. } elseif ($score > 70 && $score < 80) {
  26. echo '成绩为:B+';
  27. } elseif ($score > 80 && $score < 100) {
  28. echo '成绩为:A';
  29. } else {
  30. echo '成绩为:不合格';
  31. }
  32. // 多分支语法糖:switch
  33. echo '<br>------------------多分支语法糖:switch------------<br>';
  34. switch (true) {
  35. case $score < 60:
  36. echo '不满意';
  37. break;
  38. case $score > 60 && $score < 70:
  39. echo '满意';
  40. break;
  41. case $score > 80:
  42. echo '非常满意';
  43. break;
  44. default:
  45. echo '服务太差了';
  46. }
  47. // for循环
  48. echo '<br>-----------------------for循环-----------------------<br>';
  49. $title = ["语文", "数学", "几何", "英语", "地理"];
  50. for ($i = 0; $i < count($title); $i++) {
  51. if ($i === 1) {
  52. continue;
  53. }
  54. echo $title[$i] . '<br>';
  55. }
  56. // foreach循环
  57. echo '<br>-----------------------foreach循环-----------------------<br>';
  58. foreach ($title as $k => $v) {
  59. printf('序号:%s ---> 书名:%s<br>', $k, $v);
  60. }
  61. // while循环
  62. echo '<br>-----------------------while循环-----------------------<br>';
  63. $i = 0;
  64. while ($i < count($title)) {
  65. echo $title[$i] . '<br>';
  66. $i++;
  67. }

运行效果

流程控制演示代码

  1. <?php
  2. namespace _0809;
  3. $cs = [
  4. ['id' => '第一节', 'name' => '覃老师', 'sex' => 0, 'course' => '语文'],
  5. ['id' => '第二节', 'name' => '覃老师', 'sex' => 0, 'course' => '语文'],
  6. ['id' => '第三节', 'name' => '张老师', 'sex' => 1, 'course' => '数学'],
  7. ['id' => '第四节', 'name' => '孙老师', 'sex' => 1, 'course' => '几何'],
  8. ['id' => '第五节', 'name' => '周老师', 'sex' => 1, 'course' => '地理'],
  9. ['id' => '第六节', 'name' => '孔老师', 'sex' => 0, 'course' => '英语'],
  10. ['id' => '第七节', 'name' => '赵老师', 'sex' => 1, 'course' => '体育'],
  11. ['id' => '第八节', 'name' => '马老师', 'sex' => 0, 'course' => '美术'],
  12. ]
  13. ?>
  14. <!DOCTYPE html>
  15. <html lang="zh-CN">
  16. <head>
  17. <meta charset="UTF-8">
  18. <meta http-equiv="X-UA-Compatible" content="IE=edge">
  19. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  20. <title>课程表</title>
  21. <style>
  22. table {
  23. border-collapse: collapse;
  24. width: 360px;
  25. text-align: center;
  26. }
  27. table th,
  28. table td {
  29. border: 1px solid #000;
  30. padding: 5px;
  31. }
  32. table caption {
  33. font-size: 1.3em;
  34. }
  35. table thead {
  36. background-color: lightcyan;
  37. }
  38. .active {
  39. color: red;
  40. }
  41. </style>
  42. </head>
  43. <body>
  44. <table>
  45. <caption>20班课程表</caption>
  46. <thead>
  47. <tr>
  48. <th>节名</th>
  49. <th>教师</th>
  50. <th>性别</th>
  51. <th>课程</th>
  52. </tr>
  53. </thead>
  54. <tbody>
  55. <?php
  56. foreach ($cs as $cso) : ?>
  57. <tr>
  58. <td><?= $cso['id'] ?></td>
  59. <td><?= $cso['name'] ?></td>
  60. <td><?= $cso['sex'] ? '男' : '女' ?></td>
  61. <td><?= $cso['course'] ?></td>
  62. </tr>
  63. <?php endforeach ?>
  64. </tbody>
  65. </table>
  66. </body>
  67. </html>

运行效果

Correcting teacher:PHPzPHPz

Correction status:qualified

Teacher's comments:
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