如何打印由 json 响应返回的数组中的值？

Question

我正在尝试将一个 json 数组打印到它的值中，我在 json 解码后有以下数组，我需要循环打印它，因为它有很多项目。 例如，我必须打印值 firstName, lastName ，我将如何打印它。

stdClass Object ( [content] => Array ( [0] => stdClass Object ( [id] => 5 [firstName] => Ali [lastName] => S [profilePhotoUrl] => https://prn-spe-images.s3-ap-southeast-1.amazonaws.com/user-profiles/5.jpg [handle] => aliya ) [1] => stdClass Object ( [id] => 69 [handle] => hhtc ) ) [last] => 1 [totalPages] => 1 [totalElements] => 2 [numberOfElements] => 2 [first] => 1 [sort] => [size] => 10 [number] => 0 )

我已经完成的示例代码：

$arrayl = gettviewers($post->id,10);
foreach($arrayl as $valuel) {
  print $value1->content->firstName;
}

但它没有打印任何值。

### 以下答案的完整工作代码：###

帮助文件：

 ####### --- Get live viwers list for each broadcast --- ########
if ( ! function_exists('gettviewers'))
{ 
      function gettviewers($broId,$size){
      $CI =& get_instance();
      $url = API_SERVER.'broadcasts/public/'.$broId.'/top-viewers?size='.$size; 
      $json = json_decode(file_get_contents($url), true);
      return $json;
      }   
}

在视图中：

$arrayl = gettviewers($post->id, WI_LIVEUSERSIZE);
              foreach($arrayl as $value1) 
                { 
                 print $value1[0][firstName];
                 }

Answer 1

Foreach “获取”对象或数组的每个元素。所以当你做 foreach 你的 $value1 不是

stdClass Object ( [content] => Array ( [0] => stdClass Object ( [id] => 5 [firstName] => Ali [lastName] => S [profilePhotoUrl] => https://prn-spe-images.s3-ap-southeast-1.amazonaws.com/user-profiles/5.jpg [handle] => aliya ) [1] => stdClass Object ( [id] => 69 [handle] => hhtc ) ) [last] => 1 [totalPages] => 1 [totalElements] => 2 [numberOfElements] => 2 [first] => 1 [sort] => [size] => 10 [number] => 0 )

但是

[content] => Array ( [0] => stdClass Object ( [id] => 5 [firstName] => Ali [lastName] => S [profilePhotoUrl] => https://prn-spe-images.s3-ap-southeast-1.amazonaws.com/user-profiles/5.jpg [handle] => aliya ) [1] => stdClass Object ( [id] => 69 [handle] => hhtc ) ) [last] => 1 [totalPages] => 1 [totalElements] => 2 [numberOfElements] => 2 [first] => 1 [sort] => [size] => 10 [number] => 0

所以你的$value1 已经是[content]。另外你应该注意到[content] 是一个数组，所以你必须这样做

$arrayl = gettviewers($post->id,10);
foreach($arrayl as $valuel) {
  print $value1[0]->firstName;
}

或者在第一个循环中使用第二个 foreach 循环。

Answer 2

您可以使用json_decode 实现此目的

json_decode 将有效的 JSON 转换为 stdClass-Object。

试试这个：

$arrayl = json_decode(gettviewers($post->id, 10));

foreach($arrayl as $value1) 
{
  print $value1->content->firstName;
}

Answer 3

试试这个

$arrayl = gettviewers($post->id,10);


    if (is_object($arrayl)) {
        // Gets the properties of the given object
        // with get_object_vars function
        $arrayl = get_object_vars($arrayl);
    }

    if (is_array($arrayl)) {
        /*
        * Return array converted to object
        * Using __FUNCTION__ (Magic constant)
        * for recursive call
        */
        $arrayl = array_map(__FUNCTION__, $arrayl);
    }
    else {
        // Return array
        return $arrayl;
    }

var_dump($arrayl) or print_r($arrayl);

或

 foreach($arrayl as $key=>$val){
     echo $val->content[$key]
    }

Answer 4

要打印 json_encoded 数组，请执行此操作

$array=json_decode($data,true); //data is your json_encoded data

foreach($array as $key=>$value)
{
echo $key . ' ' . $value . PHP_EOL;
}

或者干脆做

print_r($array);

解码后。