Php json_解码后丢失约22个字符

我正在尝试用php解码json文件

function ReturnJson(){
    $json_data =  json_decode(file_get_contents('data.json'), true);
    for ($i = 0, $len = count($json_data); $i< $len; ++$i){

        $json_data[$i]['num'] = (string) ($i +1);
    }
    print_r($json_data);
    return $json_data;   
   }

结果是：

 {"control":null,"submitter":{"deviceId":"1","sessionId":"1"},"variables":[{"scope":"SESSION","value":"iPhone OS","name":"osName"},{"scope":"SESSION","value":"x86_64","name":"hardwareType"},{"scope":"SESSION","value":"6.0","name":"osVersion"},{"scope":"EVENT","value":"51115abd1e0422c533000002","name":"variant"}],"label":null,"category":null,"location":"ADSettingsViewController","timestamp":"2013-02-25T16:22:57Z","action":null,"type":"PAGEVIEW","versionNumber":"1.0","value":0,"submitted":0,"appId":"50fdc396b9efd172b8000065","controlEvent":null}{"control":null,"submitter":{"deviceId":"1","sessionId":"1"},"variables":[{"scope":"SESSION","value":"iPhone OS","name":"osName"},{"scope":"SESSION","value":"x86_64","name":"hardwareType"},{"scope":"SESSION","value":"6.0","name":"osVersion"},{"scope":"EVENT","value":"51115abd1e0422c533000002","name":"variant"}],"label":null,"category":null,"location":"ADProductViewController","timestamp":"2013-02-25T16:22:57Z","action":null,"type":"PAGEVIEW","versionNumber":"1.0","value":0,"submitted":0,"appId":"50fdc396b9efd172b8000065","controlEvent":null}{"control":"UIRoundedRectButton","submitter":{"deviceId":"1","sessionId":"1"},"variables":[{"scope":"SESSION","value":"iPhone OS","name":"osName"},{"scope":"SESSION","value":"x86_64","name":"hardwareType"},{"scope":"SESSION","value":"6.0","name":"osVersion"},{"scope":"EVENT","value":"51115abd1e0422c533000002","name":"variant"}],"label":"Checkout Now","category":"ADProductViewController","location":null,"timestamp":"2013-02-25T16:22:57Z","action":"checkoutNowTapped:","type":"EVENT","versionNumber":"1.0","value":0,"submitted":0,"appId":"50fdc396b9efd172b8000065","controlEvent":"UIControlEventTouchUpInside"}

---

如果看不到您的数据，很难判断，但可能的原因是索引不是连续的（

0,2,5,6

，而不是

0,1,2,3

）

如果不确定数据包含什么，最好使用

foreach

在数组上循环：

foreach ($json_data as $key => $value) 
{
  ...
}

---

你能提供一个不工作输入数据的例子吗？

print\r（$json\u data）在循环之前。很可能您正在覆盖循环中的数据。已发布！我确实打印了r（$json_数据）；同样的问题，我可以告诉开始丢失。所以我意识到，它是扔掉逗号时编码，所以当我解码的新文件，这对夫妇的字符不在那里…所以是的，这确实有帮助，但是，问题是我的foreach之一是删除逗号和文件的开头，出于某种原因
foreach ($json_data as $key => $value) 
{
  ...
}