使用PHP的白色过滤器JSON

我从后端收到一个API响应，并希望通过JS将其转发到客户端（浏览器）。 但是不应该有来自服务器的洞响应

一个JSON可能看起来像：

"{\"total\":6,\"sort\":{\"field\":\"created_at\",\"order\":\"desc\"},\"constraints\":       [],\"pagination\":  {\"current\":1,\"previous\":null,\"next\":null,\"per_page\":25,\"pages\":1,\"count\":6},\"response\":[{\"id\":10,\"name\":\"Prof. Dr. Dr. h. c.\",\"people_count\":2,\"allowed_actions\":{\"destroy\":false}},{\"id\":9,\"name\":\"Dr. h. c.\",\"people_count\":1,\"allowed_actions\":{\"destroy\":false}},{\"id\":8,\"name\":\"Dr. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":7,\"name\":\"Prof. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":6,\"name\":\"Prof.\",\"people_count\":4,\"allowed_actions\":{\"destroy\":false}},{\"id\":5,\"name\":\"Dr.\",\"people_count\":110,\"allowed_actions\":{\"destroy\":false}}],\"statuscode\":200}"

为了过滤这些，我开始编写一个whitelister。他在表单数组（“statuscode”、“response.name”、“response.id”、“total”）中获取json+白名单的漏洞。 现在，他应该遍历这个JSON递归并返回一个具有相同结构但删除了所有其他节点的JSON

这是我目前的状态：

public function filter($response,$whitelist,$depth = 0) {
    $filteredResponse = "";

    foreach (json_decode($response,true) as $key => $value) {
        foreach ($whitelist as $item) {
            $items = explode(".",$item);
            foreach($items as $it) {
                if($it === $key && strlen($it)>0) {
                    if(is_array($value)) {
                        for($i=1;$i<count($items);$i++) {
                            $str .= $it.".";
                        }
                        $filteredResponse[$it] = $this->filter(json_encode($value),array($str),$depth+1);
                    }
                    else $filteredResponse[$key] = $value;
                }
            }

        }
    }
    return json_encode($filteredResponse);
}

公共函数过滤器（$response，$whitelist，$depth=0）{
$filteredResponse=“”；
foreach（json_解码（$response，true）为$key=>$value）{
foreach（$项目的白名单）{
$items=分解（“.”，$item）；
foreach（$it形式的项目）{
如果（$it==$key&&strlen（$it）>0）{
if（是_数组（$value））{
对于（$i=1；$ifilter（json_encode（$value）、数组（$str），$depth+1）；
}
else$filteredResponse[$key]=$value；
}
}
}
}
返回json_encode（$filteredResponse）；
}

我现在的结果是{“总计”：6，“响应”：“\”\”，“状态码”：200}。 有人能帮我吗？

试试这个

<?php
$str = "{\"total\":6,\"sort\":{\"field\":\"created_at\",\"order\":\"desc\"},\"constraints\":       [],\"pagination\":  {\"current\":1,\"previous\":null,\"next\":null,\"per_page\":25,\"pages\":1,\"count\":6},\"response\":[{\"id\":10,\"name\":\"Prof. Dr. Dr. h. c.\",\"people_count\":2,\"allowed_actions\":{\"destroy\":false}},{\"id\":9,\"name\":\"Dr. h. c.\",\"people_count\":1,\"allowed_actions\":{\"destroy\":false}},{\"id\":8,\"name\":\"Dr. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":7,\"name\":\"Prof. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":6,\"name\":\"Prof.\",\"people_count\":4,\"allowed_actions\":{\"destroy\":false}},{\"id\":5,\"name\":\"Dr.\",\"people_count\":110,\"allowed_actions\":{\"destroy\":false}}],\"statuscode\":200}";


$arr = json_decode($str, true);


$arr_new = array();
$arr_new['total'] = $arr['total'];
$arr_new['statuscode'] = $arr['statuscode'];

foreach($arr['response'] as $arr_response)
{
      $arr_new['response_id'][] = $arr_response['id'];
      $arr_new['response_name'][] = $arr_response['name'];
}

print_r($arr_new);
?> 

---

这是一个工作版本，它解决了我的问题：

    public function filter($response,$whiteList,$depth = 0) {
    $filteredResponse = $response;

    foreach ($filteredResponse as $key => $value) {
        $isBlackListed = true;

        foreach ($whiteList as $whiteItem) {
            $whiteTokens = explode(".", $whiteItem);

            if($depth >= count($whiteTokens))
                continue;
            if($key !== $whiteTokens[$depth])
                continue;
            else {
                if(is_array($value)) {
                    $isBlackListed = false;

                    if(!$this->is_assoc($value)) {
                        $i = 0;
                        foreach($value as $element) {
                            $filteredResponse[$key][$i] = $this->filter($element, $whiteList, $depth+1);
                            $i++;
                        }
                    } else {
                        if(count($whiteTokens) != $depth+1)
                            $filteredResponse[$key] = $this->filter($value, $whiteList, $depth+1);
                    }
                } else {
                    $isBlackListed = false;
                }
            }
        }

        if($isBlackListed) 
            unset($filteredResponse[$key]);

        $isBlackListed = true;
    }
    return $filteredResponse;
}

private function is_assoc($array) {
    return (bool)count(array_filter(array_keys($array), 'is_string'));
}

---

您的JSON是一个包含更多JSON的字符串？我得到了如上所示的字符串。使用JSON_decode（）和JSON_encode，我得到了我的JSON或返回了字符串。@lvaroG.Vicario没有它的常规JSON（Firefox解析它很好）我建议编写一个已经接受解码数组的过滤器函数，并将结果重新编码为json，这样它就只关心php数组，而不关心其他数组JSON@birdspider-问题中所显示的内容没有通过，这就是我提出问题的原因。尽管这可能与问题无关：我认为这都是关于如何深入循环的问题ed Array，而不是JSON。感谢您的快速帮助。但问题是，此筛选器通常应适用于此表单中的所有JSON以及每个白名单输入。因此，我必须遍历输入并递归工作。这是我的大问题…我无法实现这一点：（你想得到什么？例如，我有上面的旧响应：我的白过滤器是数组（“statuscode”、“response.id”、“response.name”）。我想要这个输出：希望我的问题现在更清楚了？我又添加了一个答案，现在试试这个问题更复杂了……：（再次感谢。但我认为我的问题还不够清楚。您的解决方案工作得很好-但它是硬编码的。我需要一个函数调用，如filter（$json、$whitelist，…）和$whitelist=[“total”、“statuscode”、“response.name”、“response.id”]；但它还应该与[“sort”、“response.name”、“response.people\u count”]一起工作；或完全不同的JSON。这就是为什么我使用foreach（$whitelist as$item）{$items=explode（“.”，$item）；…}

<?php
$str = "{\"total\":6,\"sort\":{\"field\":\"created_at\",\"order\":\"desc\"},\"constraints\":       [],\"pagination\":  {\"current\":1,\"previous\":null,\"next\":null,\"per_page\":25,\"pages\":1,\"count\":6},\"response\":[{\"id\":10,\"name\":\"Prof. Dr. Dr. h. c.\",\"people_count\":2,\"allowed_actions\":{\"destroy\":false}},{\"id\":9,\"name\":\"Dr. h. c.\",\"people_count\":1,\"allowed_actions\":{\"destroy\":false}},{\"id\":8,\"name\":\"Dr. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":7,\"name\":\"Prof. Dr.\",\"people_count\":0,\"allowed_actions\":{\"destroy\":true}},{\"id\":6,\"name\":\"Prof.\",\"people_count\":4,\"allowed_actions\":{\"destroy\":false}},{\"id\":5,\"name\":\"Dr.\",\"people_count\":110,\"allowed_actions\":{\"destroy\":false}}],\"statuscode\":200}";


$arr = json_decode($str, true);


$arr_new = array();
$arr_new['total'] = $arr['total'];
$arr_new['statuscode'] = $arr['statuscode'];

foreach($arr['response'] as $arr_response)
{
      $arr_temp = array();
      $arr_temp['id'] = $arr_response['id'];
      $arr_temp['name'] = $arr_response['name'];
      $arr_new['response'][] = $arr_temp; 
}

print_r($arr_new);

echo json_encode($arr_new);
?>  

Array
(
    [total] => 6
    [statuscode] => 200
    [response] => Array
        (
            [0] => Array
                (
                    [id] => 10
                    [name] => Prof. Dr. Dr. h. c.
                )

            [1] => Array
                (
                    [id] => 9
                    [name] => Dr. h. c.
                )

            [2] => Array
                (
                    [id] => 8
                    [name] => Dr. Dr.
                )

            [3] => Array
                (
                    [id] => 7
                    [name] => Prof. Dr.
                )

            [4] => Array
                (
                    [id] => 6
                    [name] => Prof.
                )

            [5] => Array
                (
                    [id] => 5
                    [name] => Dr.
                )

        )

)

{"total":6,"statuscode":200,"response":[{"id":10,"name":"Prof. Dr. Dr. h. c."},{"id":9,"name":"Dr. h. c."},{"id":8,"name":"Dr. Dr."},{"id":7,"name":"Prof. Dr."},{"id":6,"name":"Prof."},{"id":5,"name":"Dr."}]}  

    public function filter($response,$whiteList,$depth = 0) {
    $filteredResponse = $response;

    foreach ($filteredResponse as $key => $value) {
        $isBlackListed = true;

        foreach ($whiteList as $whiteItem) {
            $whiteTokens = explode(".", $whiteItem);

            if($depth >= count($whiteTokens))
                continue;
            if($key !== $whiteTokens[$depth])
                continue;
            else {
                if(is_array($value)) {
                    $isBlackListed = false;

                    if(!$this->is_assoc($value)) {
                        $i = 0;
                        foreach($value as $element) {
                            $filteredResponse[$key][$i] = $this->filter($element, $whiteList, $depth+1);
                            $i++;
                        }
                    } else {
                        if(count($whiteTokens) != $depth+1)
                            $filteredResponse[$key] = $this->filter($value, $whiteList, $depth+1);
                    }
                } else {
                    $isBlackListed = false;
                }
            }
        }

        if($isBlackListed) 
            unset($filteredResponse[$key]);

        $isBlackListed = true;
    }
    return $filteredResponse;
}

private function is_assoc($array) {
    return (bool)count(array_filter(array_keys($array), 'is_string'));
}