php 问题 json_encode utf-8
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Problem json_encode utf-8
提问by epi82
I have a problem with json_encode function with special characters.
我对带有特殊字符的 json_encode 函数有问题。
For example I try this:
例如我试试这个：
$string="Svr?ek";
echo "ENCODING=".mb_detect_encoding($string); //ENCODING=UTF-8
echo "JSON=".json_encode($string); //JSON="Svr\u010dek"
What can I do to display the string correctly, so JSON="Svr?ek"?
我该怎么做才能正确显示字符串，所以 JSON="Svr?ek"？
Thank you very much.
非常感谢。
回答by TRiG
json_encode()is not actually outputting JSON* there. It's outputting a javascript string. (It outputs JSON when you give it an object or an array to encode.) That's fine, as a javascript string is what you want.
json_encode()实际上并没有在那里输出JSON*。它正在输出一个 javascript 字符串。（当你给它一个对象或一个数组来编码时，它会输出 JSON。）没关系，因为你想要一个 javascript 字符串。
In javascript (and in JSON), ?may be escaped as \u010d. The two are equivalent. So there's nothing wrong with what json_encode()is doing. It should work fine. I'd be very surprised if this is actually causing you any form of problem. However, if the transfer is safely in a Unicode encoding (UTF-8, usually)?, there's no need for it either. If you want to turn off the escaping, you can do so thus: json_encode('Svr?ek', JSON_UNESCAPED_UNICODE). Note that the flag JSON_UNESCAPED_UNICODEwas introduced in PHP 5.4.0, and is unavailable in earlier versions.
在 javascript（和 JSON）中，?可以转义为\u010d. 两者是等价的。因此，json_encode()正在做的事情没有错。它应该可以正常工作。如果这实际上给您带来了任何形式的问题，我会感到非常惊讶。但是，如果传输是安全的 Unicode 编码（通常是 UTF-8）？，也不需要它。如果你想关掉逃逸，你可以这样做。因此：json_encode('Svr?ek', JSON_UNESCAPED_UNICODE)。请注意，该标志JSON_UNESCAPED_UNICODE是在 PHP 5.4.0 中引入的，在早期版本中不可用。
By the way, contrary to what @onteria_ says, JSON doesuse UTF-8:
顺便说一句，与@onteria_ 所说的相反，JSON确实使用 UTF-8：
The character encoding of JSON text is always Unicode. UTF-8 is the only encoding that makes sense on the wire, but UTF-16 and UTF-32 are also permitted.
JSON 文本的字符编码始终是 Unicode。UTF-8 是唯一在网络上有意义的编码，但也允许使用 UTF-16 和 UTF-32。
* Or, at least, it's not outputting JSON as defined in RFC 4627. However, there are other definitions of JSON, by which scalar values are allowed.
* 或者，至少，它不输出RFC 4627 中定义的 JSON 。不过，也有JSON的其他定义，由标值是允许的。
? JSON may be in UTF-8, UTF-16LE, UTF-16BE, UFT-32LE, or UTF-32BE.
? JSON 可以是 UTF-8、UTF-16LE、UTF-16BE、UFT-32LE 或 UTF-32BE。
回答by Vulovic Vukasin
Ok, so, after you make database connection in your php script, put this line, and it should work, at least it solved my problem:
好的，所以，在您的 php 脚本中建立数据库连接后，放置这一行，它应该可以工作，至少它解决了我的问题：
mysql_query('SET CHARACTER SET utf8');
回答by onteria_
Yes, json_encodeescapes non-ascii characters. If you decode it you'll get your original result:
是的，json_encode转义非 ascii 字符。如果你解码它，你会得到你的原始结果：
$string="こんにちは";
echo "ENCODING: " . mb_detect_encoding($string) . "\n";
$encoded = json_encode($string);
echo "ENCODED JSON: $encoded\n";
$decoded = json_decode($encoded);
echo "DECODED JSON: $decoded\n";
Output:
输出：
ENCODING: UTF-8
ENCODED JSON: "\u3053\u3093\u306b\u3061\u306f"
DECODED JSON: こんにちは
EDIT: It's worth nothing that:
编辑：它毫无价值：
JSON uses Unicode exclusively.
The self-documenting format that describes structure and field names as well as specific values;
JSON 仅使用 Unicode。
描述结构和字段名称以及特定值的自记录格式；
Source: http://www.json.org/fatfree.html
来源：http: //www.json.org/fatfree.html
It uses Unicode NOTUTF-8. This FAQ Explains the difference between UTF-8 and Unicode:
它使用 Unicode 而不是UTF-8。此常见问题解答解释了 UTF-8 和 Unicode 之间的区别：
http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
You use JSON, your non-ascii characters get escaped into Unicode code points. For example こ = code point 3053.
您使用 JSON，您的非 ascii 字符会转义为 Unicode 代码点。例如こ = 代码点 3053。
