从JSON转换为stdClass的，进行更改，然后再转换回JSON

Question

因此，在一开始，send_sms.php加载之前PHP的烦恼，我有此JSON存储在数据库中：

{ 
"chats": { 
    "chat": [{ 
     "id": "1", 
     "name": "Ethan Wilberforce", 
     "messages": { 
      "message": [{ 
       "id": "1", 
       "name": "Ethan Wilberforce", 
       "text": "Hello how are you doing", 
       "time": "4:41" 
      }, { 
       "id": "2", 
       "name": "Qasim Iqbal", 
       "text": "Not bad. How about you?", 
       "time": "4:42" 
      }, { 
       "id": "3", 
       "name": "Ethan Wilberforce", 
       "text": "I'm not too bad myself.", 
       "time": "4:43" 
      }] 
     } 
    }, { 
     "id": "2", 
     "name": "Geoff Vahaaho", 
     "messages": { 
      "message": [{ 
       "id": "1", 
       "name": "Geoff Vahaaho", 
       "text": "Hello how are you doing", 
       "time": "4:41" 
      }, { 
       "id": "2", 
       "name": "Qasim Iqbal", 
       "text": "Not bad. How about you?", 
       "time": "4:42" 
      }, { 
       "id": "3", 
       "name": "Geoff Vahaaho", 
       "text": "I'm not too bad myself.", 
       "time": "4:43" 
      }, { 
       "id": "4", 
       "name": "Qasim Iqbal", 
       "text": "Nice.", 
       "time": "4:43" 
      }] 
     } 
    }] 
} 
} 

Json是完全有效的，没有错误。它存储两条聊天消息，其中包含消息。

现在，这里是PHP代码，改变了JSON：

$data = $user->data; 
    $parsed_data = json_decode($data); 

     ... 

    for($i = 0, $size = sizeof($parsed_data->chats->chat); $i < $size; ++$i) { 
     if($parsed_data->chats->chat[$i]->name == $to) { 
      $found = true; 
      $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)] = new stdClass; 
      $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)]->id = sizeof($parsed_data->chats->chat[$i]->messages->message); 
      $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)]->name = $user->name; 
      $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)]->text = $message; 
      $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)]->time = $time; 
      echo "done. "; 
      break; 
     } 
    } 

我打算这是什么做的是，在聊天的“消息”数组中添加其他stdClass的对象。所以我基本上就是这样做的，希望它能奏效。

现在，它的工作原理，种，但这里是新的JSON后，我们json_encode它：

{ 
"chats": { 
    "chat": [{ 
     "id": "1", 
     "name": "Ethan Wilberforce", 
     "messages": { 
      "message": [{ 
       "id": "1", 
       "name": "Ethan Wilberforce", 
       "text": "Hello how are you doing", 
       "time": "4:41" 
      }, { 
       "id": "2", 
       "name": "Qasim Iqbal", 
       "text": "Not bad. How about you?", 
       "time": "4:42" 
      }, { 
       "id": "3", 
       "name": "Ethan Wilberforce", 
       "text": "I'm not too bad myself.", 
       "time": "4:43" 
      }, {}, { 
       "id": 4 
      }, { 
       "name": "Qasim Iqbal" 
      }, { 
       "text": "Hello i am testing" 
      }, { 
       "time": 1326066200 
      }] 
     } 
    }, { 
     "id": "2", 
     "name": "Geoff Vahaaho", 
     "messages": { 
      "message": [{ 
       "id": "1", 
       "name": "Geoff Vahaaho", 
       "text": "Hello how are you doing", 
       "time": "4:41" 
      }, { 
       "id": "2", 
       "name": "Qasim Iqbal", 
       "text": "Not bad. How about you?", 
       "time": "4:42" 
      }, { 
       "id": "3", 
       "name": "Geoff Vahaaho", 
       "text": "I'm not too bad myself.", 
       "time": "4:43" 
      }, { 
       "id": "4", 
       "name": "Qasim Iqbal", 
       "text": "Nice.", 
       "time": "4:43" 
      }] 
     } 
    }] 
} 
} 

你会发现它的“伊桑·威尔伯福斯”聊天确实添加，但在每个字符串stdClass在“消息”数组中转换为它自己的数组项。我怎样才能解决这个问题？非常感谢。

Answer 1

你的问题是这样的：

 $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)] = new stdClass; 
     $parsed_data->chats->chat[$i]->messages->message[sizeof($parsed_data->chats->chat[$i]->messages->message)]->id = sizeof($parsed_data->chats->chat[$i]->messages->message); 

它基本上相当于：

$array[$last] = new stdClass(); 
$array[$last+1] = "id"; 
$array[$last+2] = "name"; 

你一直追加新的阵列/对象，因为你用sizeof(...)总是变得比前一行较大的一个。这不是最后一个索引，而是大小。这是$lastindex+1。

什么，你应该做的，无论如何，没有使用一个对象，只是追加数组，其所有属性的一次：

$parsed_data->chats->chat[$i]->messages->message[] = array(
     "id" => ..., 
     "name" => ..., 
     "time" => ..., 
); 

当你编码关联数组回JSON它也将成为正常的{...} JSON对象组。