php - 使用 PHP 解码 Microsoft 翻译器 API 的 JSON 输出

Question

这个问题似乎特定于 microsofttranslator.com 所以请...任何答案，如果您可以针对它进行测试...

使用以下网址进行翻译:http://api.microsofttranslator.com/V2/Ajax.svc/TranslateArray .. 我通过 cURL 发送了一些奇妙的论点，并得到了以下结果:

 [
      {
           "From":"en",
           "OriginalTextSentenceLengths":[13],
           "TranslatedText":"我是最好的",
           "TranslatedTextSentenceLengths":[5]
      },
      {
           "From":"en",
           "OriginalTextSentenceLengths":[16],
           "TranslatedText":"你是最好的",
           "TranslatedTextSentenceLengths":[5]
      }
 ]

当我在 cURL 的输出上使用 json_decode($output, true); 时，json_decode 给出了一个错误，指出返回的 JSON 中的语法不合适:

 json_last_error() == JSON_ERROR_SYNTAX

与 JSON 一起返回的 header :

Response Headers

 Cache-Control:no-cache
 Content-Length:244
 Content-Type:application/x-javascript; charset=utf-8
 Date:Sat, 06 Aug 2011 13:35:08 GMT
 Expires:-1
 Pragma:no-cache
 X-MS-Trans-Info:s=63644

Raw content:

 [{"From":"en","OriginalTextSentenceLengths":[13],"TranslatedText":"我是最好的","TranslatedTextSentenceLengths":[5]},{"From":"en","OriginalTextSentenceLengths":[16],"TranslatedText":"你是最好的","TranslatedTextSentenceLengths":[5]}]

cURL code:

    $texts = array("i am the best" => 0, "you are the best" => 0);
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $data = array(
        'appId' => $bing_appId,
        'from' => 'en',
        'to' => 'zh-CHS',
        'texts' => json_encode(array_keys($texts))
    );
    curl_setopt($ch, CURLOPT_URL, $bingArrayUrl . '?' . http_build_query($data)); 
    $output = curl_exec($ch); 

Answer 1

API 返回错误的字节顺序标记 (BOM)。
字符串数据本身是 UTF-8，但前缀为 U+FEFF，这是一个 UTF-16 BOM。只需去掉前两个字节和 json_decode。

...
$output = curl_exec($ch);
// Insert some sanity checks here... then,
$output = substr($output, 3);
...
$decoded = json_decode($output, true);

这是我的全部测试代码。

$texts = array("i am the best" => 0, "you are the best" => 0);
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = array(
    'appId' => $bing_appId,
    'from' => 'en',
    'to' => 'zh-CHS',
    'texts' => json_encode(array_keys($texts))
    );
curl_setopt($ch, CURLOPT_URL, $bingArrayUrl . '?' . http_build_query($data)); 
$output = curl_exec($ch);
$output = substr($output, 3);
print_r(json_decode($output, true));

这给了我

Array
(
    [0] => Array
        (
            [From] => en
            [OriginalTextSentenceLengths] => Array
                (
                    [0] => 13
                )

            [TranslatedText] => 我是最好的
            [TranslatedTextSentenceLengths] => Array
                (
                    [0] => 5
                )

        )

    [1] => Array
        (
            [From] => en
            [OriginalTextSentenceLengths] => Array
                (
                    [0] => 16
                )

            [TranslatedText] => 你是最好的
            [TranslatedTextSentenceLengths] => Array
                (
                    [0] => 5
                )

        )

)

Wikipedia entry on BOM