ASCII码 ASCII码

分支、循环、混编学习小结

发布于：2022-04-21 13:54:03  栏目：技术文档

分支结构

  1. <?php
  2.     // 分支结构
  3.     // 单分支
  4.     $age=18;
  5.     if($age>=18){
  6.         echo "你好";
  7.     }else{
  8.         echo "你几岁";
  9.     }
  10.     echo "<br>";
  11.     // 多分支
  12.     $age=10;
  13.     if($age>=18&&$age<=65){
  14.         echo "你好";
  15.     }
  16.     elseif($age<18){
  17.         echo "你好小朋友";
  18.     }
  19.     elseif($age>65){
  20.         echo "你好老人";
  21.     }
  22.     elseif($age>=110){
  23.         echo "你好神仙";
  24.     }
  25.     else{
  26.         echo"请输入正确年龄";
  27.     }
  28.     echo "<br>";
  29.     // switch 
  30.     $age = 100;
  31.     switch(true){
  32.         case $age>=18&&$age<=65:
  33.             echo "你好";
  34.             break;
  35.         case $age<18:
  36.             echo "你好小朋友";
  37.             break;
  38.         case $age>65:
  39.             echo "你好老人";
  40.             break;
  41.         case $age>=110:
  42.             echo "你好神仙";
  43.             break;
  44.         default:
  45.             echo"请输入正确年龄";
  47.     }

效果：

循环和混编

  1. <?php
  2. // 用二维数组来模拟数据表查询结果集
  3. $stus = [
  4.     ['id' => 1, 'name' => '刘备', 'course' => 'js', 'score' => 83],
  5.     ['id' => 2, 'name' => '关羽', 'course' => 'php', 'score' => 75],
  6.     ['id' => 3, 'name' => '张飞', 'course' => 'js', 'score' => 52],
  7.     ['id' => 4, 'name' => '孙权', 'course' => 'php', 'score' => 88],
  8.     ['id' => 5, 'name' => '周瑜', 'course' => 'js', 'score' => 65],
  9.     ['id' => 6, 'name' => '孔明', 'course' => 'php', 'score' => 53],
  10.     ['id' => 7, 'name' => '赵云', 'course' => 'js', 'score' => 63],
  11.     ['id' => 8, 'name' => '马超', 'course' => 'js', 'score' => 77],
  12.     ['id' => 9, 'name' => '姜维', 'course' => 'php', 'score' => 93],
  13.     ['id' => 10, 'name' => '黄忠', 'course' => 'js', 'score' => 81],
  14. ]
  15. ?>
  16. <!DOCTYPE html>
  17. <html lang="en">
  18. <head>
  19.     <meta charset="UTF-8">
  20.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  21.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  22.     <title>遍历与混编</title>
  23.     <style>
  24.         table{
  25.             border-collapse: collapse;
  26.             width: 1000px;
  27.             height: 500px;
  28.             text-align: center;
  29.             margin: auto;
  30.         }
  31.         table th,
  32.         table td {
  33.             border: 1px solid #000;
  34.             padding: 5px;
  35.         }
  37.         table caption{
  38.             font-size: 1.3em;
  39.         }
  40.         table thead{
  41.             background-color: lightcyan;
  42.         }
  44.     </style>
  45. </head>
  46. <body>
  47.     <table>
  48.         <caption>学生成绩</caption>
  49.         <thead>
  50.            <tr>
  51.                <th>ID</th>
  52.                <th>姓名</th>
  53.                <th>课程</th>
  54.                <th>成绩</th>
  55.            </tr>
  56.         </thead>
  57.         <tbody>
  58.             <?php foreach($stus as $stu):?>
  59.                 <tr>
  60.                     <td><?php echo $stu['id']?></td>
  61.                     <td><?php echo $stu['name']?></td>
  62.                     <td><?php echo $stu['course']?></td>
  63.                     <td><?php echo $stu['score']?></td>
  64.                 </tr>
  65.             <?php endforeach ?>
  66.         </tbody>
  67.     </table>
  68. </body>
  69. </html>

效果：

相关推荐
阅读 +

© 2020 asciim码

人生就是一场修行