如何让Google Cloud Translate PHP API返回实际字符而非Unicode转义序列

使用Cloud Translate PHP SDK翻译JSON文件中的字符串时，返回的翻译结果是Unicode转义字符而非实际字符，比如：

"Exp\u00e9riences"

每次都要逐个搜索替换，非常麻烦，有没有办法让API返回实际字符而非这种Unicode转义序列？

我的实现代码 #

public function translateJsonFile(Request $request)
{
    $htmlString = '';
    $source = 'en';
    $target = 'it';

    $key = 'My key';

    $translate = new TranslateClient([
        'key' => $key
    ]);

    $newArray = [];
    $json = File::get(base_path() . '/resources/lang/english.json');
    $array = json_decode($json, true);

    foreach ($array as $key => $value) 
    {
        $text_translated = $translate->translate($value, [
            'source' => $source,
            'target' => $target
        ])['text'];

        $newArray[$key] = $text_translated;
        usleep( 500000 );
    }

    $fileName = '/temp/translated-'.rand(1,1000).'.json';

    Storage::disk('public')->put($fileName, json_encode($newArray));

    return response()->json([
        'newArray' => $newArray,
    ]);
}

解决方法 #

问题不在Cloud Translate API本身，而是json_encode()的默认行为导致的——PHP的json_encode()默认会将非ASCII字符转为Unicode转义序列。

你只需要在调用json_encode()时添加JSON_UNESCAPED_UNICODE参数，就能让它输出实际的Unicode字符而非转义序列：

修改后的关键代码 #

1. 保存JSON文件时：

Storage::disk('public')->put($fileName, json_encode($newArray, JSON_UNESCAPED_UNICODE));

2. 返回响应时：

return response()->json([
    'newArray' => $newArray,
], 200, [], JSON_UNESCAPED_UNICODE);

完整修改后的函数 #

public function translateJsonFile(Request $request)
{
    $htmlString = '';
    $source = 'en';
    $target = 'it';

    $key = 'My key';

    $translate = new TranslateClient([
        'key' => $key
    ]);

    $newArray = [];
    $json = File::get(base_path() . '/resources/lang/english.json');
    $array = json_decode($json, true);

    foreach ($array as $key => $value) 
    {
        $text_translated = $translate->translate($value, [
            'source' => $source,
            'target' => $target
        ])['text'];

        $newArray[$key] = $text_translated;
        usleep( 500000 );
    }

    $fileName = '/temp/translated-'.rand(1,1000).'.json';

    // 添加参数避免Unicode转义
    Storage::disk('public')->put($fileName, json_encode($newArray, JSON_UNESCAPED_UNICODE));

    // 返回响应时同样添加参数
    return response()->json([
        'newArray' => $newArray,
    ], 200, [], JSON_UNESCAPED_UNICODE);
}

修改后，生成的JSON文件和返回的响应里会直接显示"Expériences"这类实际字符，不再出现Unicode转义序列。

内容的提问来源于stack exchange，提问作者gabogabans