求解数组的列数

Question

在这个数组输出中，我如何计算类型的数量？或者更好的是，如何在计算时排除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} )

尝试过 count(array_column($swatchLists, 'type'));

但输出为0

Answer 1

请尝试以下代码

$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);

每种类型的计数都将存储在$countResult中，数组键是类型值，数组值是计数。