Question

我正在从文本文件中读取json数据。该文件的内容是：

{
  "id":"tag:search.twitter.com,2005:181865366610382848",
  "body":"No one wants to carry laptops any more, but we lose IPads and they are not secure. The Sweden PM ran the country for a week on an ipad.",
  "verb":"post",
  "link":"http://twitter.com/ProfNikiEllis/statuses/181865366610382848",
  "generator":{
    "link":"http://twitter.com/#!/download/ipad",
    "displayName":"Twitter for iPad"
  },
  "postedTime":"2012-03-19T22:10:56.000Z",
  "provider":{
    "link":"http://www.twitter.com",
    "displayName":"Twitter",
    "objectType":"service"
  },
  "object":{
    "summary":"No one wants to carry laptops any more, but we lose IPads and they are not secure. The Sweden PM ran the country for a week on an ipad.","id":"object:search.twitter.com,2005:181865366610382848",
    "link":"http://twitter.com/ProfNikiEllis/statuses/181865366610382848",
    "postedTime":"2012-03-19T22:10:56.000Z",
    "objectType":"note"
  }
}

我的php程序从文本文件中读取内容，并使用json_decode获取各个值。但是，json_decode为我提供了字符串输出而不是数组输出。请帮忙！！

$file="gist.txt";
//Convert json output to array output
$string = file_get_contents($file);
$json_output = json_decode($string,true);
echo "Check if array: ";
echo is_array($json_output)? "true": "false";echo "<br>";
echo "Check if string: ";
echo is_string($json_output)? "true": "false";echo "<br>";
echo $json_output["id"];
echo $json_output["body"];
echo "***********************************";

我的程序的输出是：

Check if array: false
Check if string: true
{{***********************************

Answer 1

好的，所以文件中的json代码似乎有问题。我缩短了文件的内容，现在代码工作了。

Answer 2

我只是在本地运行你的代码，它正按预期运行：

Check if array: true
Check if string: false

运行它并告诉我们你得到了什么，它可能是一个权限：

$string = file_get_contents($file);
var_dump($string);

如果文件成功打开，它应该输出文件的内容，如果失败则输出自解释的PHP错误。

Json_decode返回字符串输出

2 个答案: