Laravel Collect集合用pluck取多维数组中某个字段值

例如目前有多维数组结构如下：

[{"id": 29,"shop_id": 15,"good_id": 2520,"type": "FIX","name": "1312","freedom_count": 1,"group_items": [{"id": 2461,"good_group_id": 29,"shop_id": 15,"good_id": 1687,"quantity": 1,"add_price": 3000,"sort": 1,"good": {"id": 1687,"title": "可乐","price": 12000,"unit": "杯","status": "NORMAL"}},{"id": 2459,"good_group_id": 29,"shop_id": 15,"good_id": 2516,"quantity": 1,"add_price": 1000,"sort": 1,"good": {"id": 2516,"title": "雪碧","price": 10000,"unit": "杯","status": "NORMAL"}},{"id": 62,"good_group_id": 29,"shop_id": 15,"good_id": 2460,"quantity": 2,"add_price": 0,"sort": 1,"good": {"id": 2460,"title": "咖啡","price": 9000,"unit": "杯","status": "NORMAL"}}]},{"id": 36,"shop_id": 15,"good_id": 2520,"type": "FREEDOM","name": "自由搭配","freedom_count": 2,"group_items": [{"id": 2464,"good_group_id": 36,"shop_id": 15,"good_id": 2460,"quantity": 1,"add_price": 0,"sort": 1,"good": {"id": 2460,"title": "圣代奶茶","price": 9000,"unit": "杯","status": "NORMAL"}},{"id": 2465,"good_group_id": 36,"shop_id": 15,"good_id": 1687,"quantity": 1,"add_price": 0,"sort": 1,"good": {"id": 1687,"title": "珍珠奶茶","price": 12000,"unit": "杯","status": "NORMAL"}}]}
]

要从以上3维数组中取出最底层good对象的title属性，用以下方式可以直接获取：

$json     = '[{"id": 29,"shop_id": 15,"good_id": 2520,"type": "FIX","name": "1312","freedom_count": 1,"group_items": [{"id": 2461,"good_group_id": 29,"shop_id": 15,"good_id": 1687,"quantity": 1,"add_price": 3000,"sort": 1,"good": {"id": 1687,"title": "可乐","price": 12000,"unit": "杯","status": "NORMAL"}},{"id": 2459,"good_group_id": 29,"shop_id": 15,"good_id": 2516,"quantity": 1,"add_price": 1000,"sort": 1,"good": {"id": 2516,"title": "雪碧","price": 10000,"unit": "杯","status": "NORMAL"}},{"id": 62,"good_group_id": 29,"shop_id": 15,"good_id": 2460,"quantity": 2,"add_price": 0,"sort": 1,"good": {"id": 2460,"title": "咖啡","price": 9000,"unit": "杯","status": "NORMAL"}}]},{"id": 36,"shop_id": 15,"good_id": 2520,"type": "FREEDOM","name": "自由搭配","freedom_count": 2,"group_items": [{"id": 2464,"good_group_id": 36,"shop_id": 15,"good_id": 2460,"quantity": 1,"add_price": 0,"sort": 1,"good": {"id": 2460,"title": "圣代奶茶","price": 9000,"unit": "杯","status": "NORMAL"}},{"id": 2465,"good_group_id": 36,"shop_id": 15,"good_id": 1687,"quantity": 1,"add_price": 0,"sort": 1,"good": {"id": 1687,"title": "珍珠奶茶","price": 12000,"unit": "杯","status": "NORMAL"}}]}]';
$arr      = json_decode($json, true);
$titles   = collect($arr)->pluck('group_items.*.good.title')->collapse()->toArray();
dd($titles);

每多一层级的数组可以用通配符 * 代表，之后继续找下级对象字段即可；collapse函数是将多个数组合并为单个数组；

结果：

array:5 [▼0 => "可乐"1 => "雪碧"2 => "咖啡"3 => "圣代奶茶"4 => "珍珠奶茶"
]

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Laravel Collect集合用pluck取多维数组中某个字段值

Laravel Collect集合用pluck取多维数组中某个字段值

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