OR

Question

我想知道如何计算有多少人关注Instagram中的某个人并将数字放在var中，Instagram会为您提供以下链接：

https://api.instagram.com/v1/users/3/followed-by?access_token=xxxxxxxxx.xxxxxxxxxxxxxxxxxxxx

并显示如此结果

{
    "data": [{
        "username": "meeker",
        "first_name": "Tom",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_6623_75sq.jpg",
        "id": "6623",
        "last_name": "Meeker"
    },
    {
        "username": "Mark",
        "first_name": "Mark",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_29648_75sq_1294520029.jpg",
        "id": "29648",
        "last_name": "Shin"
    },
    {
        "username": "nancy",
        "first_name": "Nancy",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_13096_75sq_1286441317.jpg",
        "id": "13096",
        "last_name": "Smith"
    }]
}

我如何计算有多少并将其放在var中，让我们说：

<? echo "You are been follow by ".$followers." users!"; ?>

要显示：您已关注3位用户！

Answer 1

您需要使用json_decode来解码JSON响应，然后访问结果对象的数据属性（一组'跟随者'对象），并计算：

$json = '{
    "data": [{
        "username": "meeker",
        "first_name": "Tom",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_6623_75sq.jpg",
        "id": "6623",
        "last_name": "Meeker"
    },
    {
        "username": "Mark",
        "first_name": "Mark",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_29648_75sq_1294520029.jpg",
        "id": "29648",
        "last_name": "Shin"
    },
    {
        "username": "nancy",
        "first_name": "Nancy",
        "profile_picture": "http://distillery.s3.amazonaws.com/profiles/profile_13096_75sq_1286441317.jpg",
        "id": "13096",
        "last_name": "Smith"
    }]
}';
$json = json_decode($json);
echo "You have " .count($json->data) ." followers"

OR

$json = json_decode($json,true);
echo "You have " .count($json['data']) ." followers"

Answer 2

您将获得json字符串，需要使用json_decode解码它。

$data = json_decode($string,true);
$followers = count($data['data']);

CodePad Demo

Answer 3

使用json_decode()从JSON创建PHP数组。然后你可以简单地对count()进行操作：

$jsonData = json_decode($yourAPIResult);
echo count($jsonData->data);

但是，请注意，如果API未返回正确的JSON字符串，您可能应该设置一些错误处理。所以这样的事情可能会更好：

if (is_null($jsonData) || !property_exists($jsonData, 'data')) {
   echo '?';
} else {
   echo count($jsonData->data);
}

Answer 4

您需要使用json_decode()来返回PHP数组。然后，您需要做的就是使用'data'键count()数组中的所有值。

Answer 5

您可以使用json_decode

$array = json_decode($str);

然后给

echo count($array);

它将提供用户总数

Answer 6

计算返回为JSON的条目的简单方法

echo count(json_decode($followers);

显示计数结果

6 个答案:

OR