PHP 过滤器 Json 对象

PHP Filter Json Object

我有这个 json 对象:

$categories = "
[
   {
      "id":5,
      "parent_id":0,
      "image_url":"https://files.cdn.printful.com/o/upload/catalog_category/77/7776d01e716d80e3ffbdebbf3db6b198_t?v=1652883254",
      "title":"Home & living"
   },
   {
      "id":6,
      "parent_id":1,
      "image_url":"https://files.cdn.printful.com/o/upload/catalog_category/4b/4b37924aaa8e264d1d3cd2a54beb6436_t?v=1652883254",
      "title":"All shirts"
   }
]
"

我想获取 parent_id 不为 0 的类别。有人知道我该怎么做吗?

首先,您对所有内容都使用双引号 ("),这是行不通的,因为 PHP 不知道哪部分是您的字符串,哪部分只是JSON-data。一旦您使用了一些单引号 ('),这将真正起作用。然后你可以:

  1. 使用json_decode()解码数据
  2. 使用array_filter()过滤

像这样:

$categories = '
[
   {
      "id":5,
      "parent_id":0,
      "image_url":"https://files.cdn.printful.com/o/upload/catalog_category/77/7776d01e716d80e3ffbdebbf3db6b198_t?v=1652883254",
      "title":"Home & living"
   },
   {
      "id":6,
      "parent_id":1,
      "image_url":"https://files.cdn.printful.com/o/upload/catalog_category/4b/4b37924aaa8e264d1d3cd2a54beb6436_t?v=1652883254",
      "title":"All shirts"
   }
]
';

$data = json_decode($categories, true);

$relevant = array_filter($data, function($entry) {
   return $entry['parent_id'] !== 0;
});

var_dump($relevant);

输出:

array(1) {
  [1]=>
  array(4) {
    ["id"]=>
    int(6)
    ["parent_id"]=>
    int(1)
    ["image_url"]=>
    string(107) "https://files.cdn.printful.com/o/upload/catalog_category/4b/4b37924aaa8e264d1d3cd2a54beb6436_t?v=1652883254"
    ["title"]=>
    string(10) "All shirts"
  }
}

示例:https://3v4l.org/5psNk