使用 printf 进行千位分隔符

Question

printf 中的千位分隔符（如逗号）是如何实现的？

示例：

printf("<td class='number'>%d</td>", $totals['Sold']); //need thousand separated 
printf("<td class='number'>%.2f</td>", $totals['Fees']); //need thousand separated

更新这是我最初的内容：

foreach(array_keys($totals) as $key){
        if(is_numeric($totals[$key])){
            $totals[$key] = number_format($totals[$key],2);
        }
    }

    echo "</tbody>
        <tfoot><tr>";
    echo "<td class='text' colspan='4'>Totals:</td>";
    echo "<td class='number'>{$totals['Bought']}</td>";
    echo "<td class='number'>{$totals['Sold']}</td>";
    echo "<td class='number'>{$totals['Fees']}</td>";
    echo "<td class='number'>{$totals['Realized']}</td>";
    echo "<td class='number'>{$totals['Net']}</td>";
    echo "<td colspan='3'>{$totals['EOD Price']}</td>";
    echo "</tr>
        </tfoot>";

我希望它是这样的：

echo "</tbody>
        <tfoot><tr>";
    echo "<td class='text' colspan='3'>Totals:</td>";
    printf("<td class='number'>%d</td>", $totals['Bought']) ;
    printf("<td class='number'>%d</td>", $totals['Sold']) ;
    printf("<td class='number'>%.2f</td>", $totals['Fees']) ;
    printf("<td class='number'>%.2f</td>", $totals['Realized']) ;
    printf("<td class='number'>%.2f</td>", $totals['Net']) ;
    printf("<td colspan='3'>%.2f</td>", $totals['EOD Price']) ;
    echo "</tr>
        </tfoot>";

但我需要逗号

Answer 1

让你的代码变得漂亮并且不要全部重复。只需打破 PHP 上下文即可执行此操作，然后使用 number_format 代替 printf 进行 echo：

</tbody>
<tfoot>
    <tr>
        <td ...>Totals</td>
        <td ...><?php echo number_format($totals['Bought'], 0); ?></td>
        <td ...><?php echo number_format($totals['Sold'], 0); ?></td>
        <td ...><?php echo number_format($totals['Fees'], 2); ?></td>
        ...
    </tr>
</tfoot>

Answer 2

您可以使用 number_format 函数。

string number_format ( float $number , int $decimals = 0 , string $dec_point = '.' , string $thousands_sep = ',' )

http://php.net/manual/en/function.number-format.php

Answer 3

除了 ircmaxell 的答案之外：

如果您有一个多语言软件，并且您不想每次调用 number_format 时都传递 dec_point 和数千_sep 参数，您可以使用自定义函数来检查当前区域设置以确定当前的小数点和千位分隔符如下所示：

<?php
    /**
     * Calls {@link number_format} with automatically determining dec_point and thousands_app
     * according to the current locale in case they are null or omitted.
     * @param float $number The number being formatted.
     * @param int $decimals [optional] Sets the number of decimal points.
     * @param string|null $dec_point [optional] Decimal point character (determined automatically
     *        when set to null or omitted).
     * @param string|null $thousands_sep [optional] Thousands separator character (determined
     *        automatically when set to null or omitted).
     * @return string
     */
    function custom_number_format($number, $decimals = 0, $dec_point = null, $thousands_sep = null) {
        $locale            = setlocale(LC_NUMERIC, 0); // yes, there is no getlocale()
        $def_dec_point     = '.';
        $def_thousands_sep = ',';
        switch (substr($locale, 0, 2)) {
            case 'de':
                $def_dec_point     = ',';
                $def_thousands_sep = '.';
                break;
            case 'fr':
                $def_dec_point     = ',';
                $def_thousands_sep = ' ';
                break;
            case 'en':
            default:
                $def_dec_point     = '.';
                $def_thousands_sep = ',';
        }
        if (!isset($dec_point)) $dec_point = $def_dec_point;
        if (!isset($thousands_sep)) $thousands_sep = $def_thousands_sep;

        return number_format($number, $decimals, $dec_point, $thousands_sep);
    }

    $nr = 1234.56;
    setlocale(LC_NUMERIC, 'de_DE');
    echo custom_number_format($nr, 2);
    # output: 1.234,56

    setlocale(LC_NUMERIC, 'en_US');
    echo custom_number_format($nr, 2);
    # output: 1,234.56

    setlocale(LC_NUMERIC, 'fr_FR');
    echo custom_number_format($nr, 2);
    # output: 1 234,56

    # you still can use whatever you want as dec_point and thousands_sep no matter which locale is set
    setlocale(LC_NUMERIC, 'de_CH');
    echo custom_number_format($nr, 2, '.', "'");
    # output: 1'234.56

Answer 4

$totals['Sold']=number_format($totals['Sold']);
$totals['Fees']=number_format($totals['Fees']);