根据数组键值将数组拆分为子数组
我在按键值拆分数组时遇到一个问题。我的数组如下所示：-
Array
(
[0] => Array
(
[product_id] => 6
[brand_id] => 2
)
[1] => Array
(
[product_id] => 1
[brand_id] => 1
)
[2] => Array
(
[product_id] => 5
[brand_id] => 1
)
)
现在我想根据brand_id过滤分割数组。我的预期输出如下：-
Array(
[0] => Array(
[0] => Array
(
[product_id] => 6
[brand_id] => 2
)
)
[1] => Array(
[0] => Array
(
[product_id] => 1
[brand_id] => 1
)
[1] => Array
(
[product_id] => 5
[brand_id] => 1
)
)
)
我的输入数组存储在 $proArray 变量中
我的尝试如下：-
$brands = array();
foreach ($proArr as $key => $pro) {
$brands[] = $pro['brand_id'];
}
$brands = array_unique($brands);
$ckey = 0;
foreach($brands as $brand){
}
MYYA2回答
-
BIG阳
一种方法是使用简单的foreach()循环来根据您的brand_id推送值，如下所示-$key = 'brand_id';$return = array();foreach($array as $v) { $return[$v[$key]][] = $v;}print_r($return);工作演示： https://3v4l.org/bHuWV -
慕田峪7331174
代码：$arr = array( array( 'product_id' => 6, 'brand_id' => 2 ), array( 'product_id' => 1, 'brand_id' => 1 ), array( 'product_id' => 5, 'brand_id' => 1 ));$res = [];foreach ($arr as $key => $value) $res[$value['brand_id']][] = $value;$res = [...$res];print_r($res);输出：Array( [0] => Array ( [0] => Array ( [product_id] => 6 [brand_id] => 2 ) ) [1] => Array ( [0] => Array ( [product_id] => 1 [brand_id] => 1 ) [1] => Array ( [product_id] => 5 [brand_id] => 1 ) ))
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