Php 使用 3d 关联数组中的数据打印 HTML 表，其中数量范围考虑当前值和下一次迭代的值

我建议您将表生成分解为可重复的部分.将业务逻辑与演示文稿分离是提高可读性和可维护性的好方法.

创建模板字符串，并在迭代时用数据填充它们.

我可能会美化数组声明，以便更容易地"观察".

define('TAX_RATES', [
    'Single' => [
        'Ranges' => [0,  9700, 39475, 84200, 160725, 204100, 510300],
        'MinTax' => [0,   970,  4543, 14382,  32748,  46628, 153798],
        'Rates'  => [10,   12,    22,    24,     32,     35,     37],
    ],
    'Married_Jointly' => [
        'Ranges' => [0, 19400, 78950, 168400, 321450, 408200, 612350],
        'MinTax' => [0,  1940,  9086,  28765,  65497,  93257, 164709],
        'Rates'  => [10,   12,    22,     24,     32,     35,     37],
    ],
    'Married_Separately' => [
        'Ranges' => [0, 9700, 39475,    84200,   160725,   204100,   306175],
        'MinTax' => [0,  970,  4543, 14382.50, 32748.50, 46628.50, 82354.75],
        'Rates'  => [10,  12,    22,       24,       32,       35,       37],
    ],
    'Head_Household' => [
        'Ranges' => [0, 13850, 52850, 84200, 160700, 204100, 510300],
        'MinTax' => [0,  1385,  6065, 12962,  31322,  45210, 152380],
        'Rates'  => [10,   12,    22,    24,     32,     35,     37],
    ]
]);

代码:(Demo -- click the eye icon to see the rendered html)

$tableTemplate = <<<TABLE
<h2>%s</h2>
<table border="1">
    <tr>
        <th>Taxable Income</th>
        <th>Tax Rate</th>
    </tr>
%s
</table>
TABLE;

$rowTemplate = <<<ROW
    <tr>
        <td>%s</td>
        <td>%s%d%%</td>
    </tr>
ROW;

foreach (TAX_RATES as $status => $data) {
    $rows = [];
    $count = count($data['Rates']);
    for ($i = 0; $i < $count; ++$i) {
        $rows[] = sprintf(
            $rowTemplate,
            isset($data['Ranges'][$i + 1])
                ? '$' . number_format($data['Ranges'][$i] + ($i ? 1 : 0)) . ' - $' . number_format($data['Ranges'][$i + 1])
                : "> $" . number_format($data['Ranges'][$i]),
            $data['MinTax'][$i] ? '$' . number_format($data['MinTax'][$i], 2) . ' + ' : '',
            $data['Rates'][$i]
        );
    }
    printf($tableTemplate, $status, implode("\n", $rows));
}

请注意，模板字符串中的文字%必须由另一个%进行"转义".否则，将变量字符串标记为%s，变量整数标记为%d，浮点数标记为%f.这是一个基本的概要，但是您可以使用printf()系列函数享受更多的格式化功能.(sprintf()是printf()的"静默"版本，它只返回它的有效负载，而不是打印它.)

随心所欲地添加货币格式.