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变量类型 遍历php多维数组 购物车

发布于:2022-02-19 16:54:24  栏目:技术文档

变量类型

4种标量类型 整型 字符串 布尔型 浮点型2种复合型 数组 对象2种特殊类型 resource null

整型 $int = 32;字符串 定义在单引号、双引号、定界符中 $password = "qnfjklg123";布尔型 $boolean = true;浮点型$float = 12.12;数组$user = ['id' => 1, 'name' => '李四', 'email' => '123456789@qq.com'];resource

  1. $handle = fopen('log.log','w')
  2. var_dump($handle);

null$avatar = null;

数组遍历

  1. <!DOCTYPE html>
  2. <html lang="zh-CN">
  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><? echo "数组遍历" ?></title>
  8. </head>
  9. <body>
  10. <?php
  11. /**
  12. * foreach($arr as $k=>$v)
  13. * {
  14. * each $v['name'];
  15. * }
  16. */
  17. $navs = [
  18. ['id' => 1, 'name' => '前端相关'],
  19. ['id' => 2, 'name' => '后端相关'],
  20. ['id' => 3, 'name' => '微信相关'],
  21. ['id' => 4, 'name' => '辅助学习'],
  22. ['id' => 5, 'name' => 'phppadmin管理系统'],
  23. ];
  24. ?>
  25. </body>
  26. <div>
  27. <ul>
  28. <?php foreach ($navs as $k => $v) { ?>
  29. <li><?= $v['name'] ?></li>
  30. <?php } ?>
  31. </ul>
  32. <ul>
  33. <?php foreach ($navs as $k => $v) : ?>
  34. <li><?= $v['name'] ?></li>
  35. <? endforeach ?>
  36. </ul>
  37. <ul>
  38. <?php
  39. foreach ($navs as $v) {
  40. echo "<li>{$v['name']}</li>";
  41. }
  42. ?>
  43. </ul>
  44. </div>
  45. </html>
  46. <!-- php模板语法 为了省略流程控制中或者循环遍历中的{}对齐问题 -->
  47. <!-- foreach...endforeach if...endif switch...endswitch while...endwhile -->

购物车

  1. <!DOCTYPE html>
  2. <html lang="zh-CN">
  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>购物车</title>
  8. </head>
  9. <body>
  10. <?php
  11. $arr = [
  12. ['name' => '苹果', 'num' => 1, 'price' => 5],
  13. ['name' => '柚子', 'num' => 1, 'price' => 10]
  14. ];
  15. ?>
  16. <div>
  17. <table border="1" cellspacing="0">
  18. <thead>
  19. <tr>
  20. <th>品名</th>
  21. <th>数量</th>
  22. <th>价格</th>
  23. </tr>
  24. </thead>
  25. <tbody>
  26. <?php foreach ($arr as $key =>
  27. $value) { ?>
  28. <tr>
  29. <td>
  30. <?= $value['name'] ?>
  31. </td>
  32. <td>
  33. <?= $value['num'] ?>
  34. </td>
  35. <td>
  36. <?= $value['price'] ?>
  37. </td>
  38. </tr>
  39. <?php } ?>
  40. </tbody>
  41. <tfoot>
  42. </tfoot>
  43. </table>
  44. </div>
  45. </body>
  46. </html>
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