变量类型遍历php多维数组购物车 -

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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

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

null
$avatar = null;

数组遍历

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title><? echo "数组遍历" ?></title>
</head>
<body>
    <?php
    /**
     * foreach($arr as $k=>$v)
     * {
     * each $v['name'];
     * }
     */
    $navs = [
        ['id' => 1, 'name' => '前端相关'],
        ['id' => 2, 'name' => '后端相关'],
        ['id' => 3, 'name' => '微信相关'],
        ['id' => 4, 'name' => '辅助学习'],
        ['id' => 5, 'name' => 'phppadmin管理系统'],
    ];
    ?>
</body>
<div>
    <ul>
        <?php foreach ($navs as $k => $v) { ?>
            <li><?= $v['name'] ?></li>
        <?php } ?>
    </ul>
    <ul>
        <?php foreach ($navs as $k => $v) : ?>
            <li><?= $v['name'] ?></li>
        <? endforeach ?>
    </ul>
    <ul>
        <?php
        foreach ($navs as $v) {
            echo "<li>{$v['name']}</li>";
        }
        ?>
    </ul>
</div>
</html>
<!-- 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 -->
<!-- foreach...endforeach   if...endif  switch...endswitch  while...endwhile -->

购物车

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>购物车</title>
</head>
<body>
    <?php
    $arr = [
        ['name' => '苹果', 'num' => 1, 'price' => 5],
        ['name' => '柚子', 'num' => 1, 'price' => 10]
    ];
    ?>
    <div>
        <table border="1" cellspacing="0">
            <thead>
                <tr>
                    <th>品名</th>
                    <th>数量</th>
                    <th>价格</th>
                </tr>
            </thead>
            <tbody>
                <?php foreach ($arr as $key =>
                    $value) { ?>
                    <tr>
                        <td>
                            <?= $value['name'] ?>
                        </td>
                        <td>
                            <?= $value['num'] ?>
                        </td>
                        <td>
                            <?= $value['price'] ?>
                        </td>
                    </tr>
                <?php } ?>
            </tbody>
            <tfoot>
            </tfoot>
        </table>
    </div>
</body>
</html>

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12.21作业

2021-12-22 11:58:25