Php 如何获取数组的键作为标题

这是我的循环数组

(
    [Size] => Array
        (
            [07601-01] => S,
            [07601-02] => M,
            [07601-03] => L,
            [07601-04] => XL,
            [07601-05] => XXL,
        )

    [other] => Array
        (
            [07601-01] => S,
            [07601-02] => M,
            [07601-03] => L,
            [07601-04] => XL,
            [07601-05] => XXL,
        )

)

这是我的循环

<?php 
     foreach($product_atttribute as $attr) { 
?>

大小

M

XL

其他 ……等等

---

在上面的循环中，我如何获得

大小

，

其他

等标题，如下所示

使用

数组键

检索所传递数组的所有键，如果您需要它

foreach（$key=>attribute as$attr）

现在，在

key

Size和other循环中还有一个自复制器，OP是：正如另一个答案所建议的，要呈现表的标题，请使用

array_keys

仅提取键。

foreach($product_attribute as $key => $value) { }

$arr = array(
    'Size' => array
        (
            '07601-01' => 'S',
            '07601-02' => 'M',
            '07601-03' => 'L',
            '07601-04' => 'XL',
            '07601-05' => 'XXL',
        ),

    'other' => array
        (
            '07601-01' => 'S',
            '07601-02' => 'M',
            '07601-03' => 'L',
            '07601-04' => 'XL',
            '07601-05' => 'XXL',
        )

);

foreach( $arr as $key => $value ) {
    echo '<strong>', $key, '</strong><br/>';
    $num = 1;
    foreach( $value as $size ) {
        echo ' ', $num++, '. ',  $size, '<br/>';
    }
}

$arr = array(
    'Size' => array
        (
            '07601-01' => 'S',
            '07601-02' => 'M',
            '07601-03' => 'L',
            '07601-04' => 'XL',
            '07601-05' => 'XXL',
        ),

    'other' => array
        (
            '07601-01' => 'S',
            '07601-02' => 'M',
            '07601-03' => 'L',
            '07601-04' => 'XL',
            '07601-05' => 'XXL',
        )

);

foreach( $arr as $key => $value ) {
    echo '<strong>', $key, '</strong><br/>';
    $num = 1;
    foreach( $value as $size ) {
        echo ' ', $num++, '. ',  $size, '<br/>';
    }
}

Size
 1. S
 2. M
 3. L
 4. XL
 5. XXL
other
 1. S
 2. M
 3. L
 4. XL
 5. XXL