用PHP访问Json Data中的文本

Question

如果你能帮助我访问这个Json的“文本”，我将不胜感激。我试过但我不能，我留下了PHP代码。

php中用于访问和提取文本的代码：

$url = $url_to;
$array = array();    

while(1) {
    $file = fopen("links.txt", "a");
    $json = json_decode(file_get_contents($url));
    $filter_array = array_filter($json->params->tag->to_posts->bordes->node->to_caption->bordes->node);
    foreach($filter_array as $object_return){
        echo $object_return->code.'</br>'; 
        fwrite($file, $object_return->code);
        fwrite($file,"\n");
    }
    fclose($file);

这是json数据：

    {  
   "params":{  
      "tag":{  
         "name":"examples",
         "is_top_media_only":false,
         "media":{  },
         "to_posts":{  
            "bordes":[  
               {  
                  "node":{  
                     "id":"168970",
                     "to_caption":{  
                        "bordes":[  
                           {  
                              "node":{  
                                 "text":"Yes, its very strong..."
                              }
                           }
                        ]
                     },
                     "shortcode":"BBB1",
                     "edge_media_to_comment":{  
                        "count":2
                     },
                     "taken_at_timestamp":15156,
                     "dimensions":{  
                        "height":1078,
                        "width":1080
                     },
                     "display_url":"http://example.com",
                     "edge_liked_by":{  
                        "count":73
                     },
                     "owner":{  
                        "id":"40237"
                     },
                     "thumbnail_src":"http://example.com",
                     "thumbnail_resources":[  
                        {  
                           "src":"http://example.com",
                           "config_width":150,
                           "config_height":150
                        },
                        {  
                           "src":"http://example.com",
                           "config_width":240,
                           "config_height":240
                        },
                        {  
                           "src":"http://example.com",
                           "config_width":320,
                           "config_height":320
                        },
                        {  
                           "src":"http://example.com",
                           "config_width":480,
                           "config_height":480
                        },
                        {  
                           "src":"http://example.com",
                           "config_width":640,
                           "config_height":640
                        }
                     ],
                     "is_video":false
                  }
               },
               {  
                  "node":{  
                     "id":"16738",
                     "to_caption":{  
                        "bordes":[  
                           {  
                              "node":{  
                                 "text":"Hahaha its cool"
                              }
                           }
                        ]
                     },

我需要访问json的所有文本，因为还有更多，但我留下了。 正如您所看到的，我试图提取它，但它总是会生成类型为sdtClass的错误。 谢谢你！