求解數組的列數

Question

在這個陣列輸出中，我如何計算類型的數量？或者更好的是，如何在計算時排除additional_data？

Array (
    [124] =>
        Array (
            [type] => 0
            [value] => 4 Pack
            [label] => 4 Pack
            )
    [125] =>
        Array (
            [type] => 0
            [value] => 6 Pack
            [label] => 6 Pack
        )
    [126] =>
        Array (
            [type] => 0
            [value] => 12 Pack
            [label] => 12 Pack
        )
    [additional_data] => {"swatch_input_type":"text","update_product_preview_image":"1","use_product_image_for_swatch":0} )

嘗試過 count(array_column($swatchLists, 'type'));

但輸出為0

Answer 1

請嘗試以下程式碼

$countResult = array();

foreach( $swatchLists as $item ){
    if( isset($item['type']) == false ){
        continue; // 排除不包含'type'的数组
    }
    $type = $item['type'];
    if( isset($countResult[$type]) ){
        $countResult[$type]++;
    }else{
        $countResult[$type] = 1;
    }
}
var_dump($countResult);

每種類型的計數都會儲存在$countResult中，陣列鍵是類型值，陣列值是計數。