Question

我有一个动态数组。我在这里显示了该数组的一个实例。虽然存在not fixed how many keys

Array
(
    [lowest] => 1200
    [highest] => 139900
    [cat_0] => Womens Clothing
    [cat_1] => Smart Phones
    [cat_2] => Mens Clothing
    [cat_3] => Electronics
    [chil_cat_0] => 18
    [chil_cat_1] => 12
    [chil_cat_2] => 7
    [chil_cat_3] => 11
    [chil_cat_4] => 17
    [keyword] => 
)

对于这个数组，我想创建子数组.like。

Array
(
    [cat_0] => Womens Clothing
    [cat_1] => Smart Phones
    [cat_2] => Mens Clothing
    [cat_3] => Electronics
)

注意：基于类似的键。我必须将我的主数组分解为子数组

但是，主阵列可以有任意数量的相似行。

请帮帮我。

Answer 1

您可以使用array_filter()仅保留与您想要的键匹配的值：

$out = array_filter($array, function($key){
    // Keep only keys that begins by 'cat_'
    return substr($key, 0, 4) == 'cat_' ; 
    // or
    return preg_match('~^cat_[\d]+~',$key) ; // Use cat_ + number
}, ARRAY_FILTER_USE_KEY);
print_r($out);

输出：

Array
(
    [cat_0] => Womens Clothing
    [cat_1] => Smart Phones
    [cat_2] => Mens Clothing
    [cat_3] => Electronics
)

从动态主数组创建子数组...基于类似的密钥对

1 个答案: