如何獲得數組的鍵作爲標題

Question

下面是從環

(
    [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, 
     ) 

) 

這裏我的數組是我的循環

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

尺寸

1. 小號
2. M
3. XL

其他 .....等

<?php 
    } 
?> 

在上述循環我如何能得到Size，other，等像標題下面

Answer 1

$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/>'; 
    } 
} 

輸出：

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

Answer 2

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

Answer 3

使用array_keys來檢索通過的數組的所有鍵如果你需要它