问题描述
我对带有特殊字符的 json_encode 函数有问题.
I have a problem with json_encode function with special characters.
例如我试试这个:
$string="Svrček";
echo "ENCODING=".mb_detect_encoding($string); //ENCODING=UTF-8
echo "JSON=".json_encode($string); //JSON="Svru010dek"
我该怎么做才能正确显示字符串，所以 JSON="Svrček"?
What can I do to display the string correctly, so JSON="Svrček"?
非常感谢.
推荐答案
json_encode() 实际上并未输出 JSON* 那里.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.
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.
在 javascript(和 JSON)中，č 可以转义为 u010d.两者是等价的.所以 json_encode() 所做的没有错.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，如果传输安全地采用 Unicode 编码(通常为 UTF-8)†，则也不需要它.如果你想关闭转义，你可以这样做:json_encode('Svrček', JSON_UNESCAPED_UNICODE).请注意，标志 JSON_UNESCAPED_UNICODE 是在 PHP 5.4.0 中引入的，在早期版本中不可用.
In javascript (and in JSON), č 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('Svrček', JSON_UNESCAPED_UNICODE). Note that the flag JSON_UNESCAPED_UNICODE was introduced in PHP 5.4.0, and is unavailable in earlier versions.
顺便说一句，与@onteria_ 所说的相反，JSON 确实使用UTF-8:
By the way, contrary to what @onteria_ says, JSON does use UTF-8:
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.
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.
<小时>
* 或者，至少，它没有输出 RFC 4627 中定义的 JSON.但是，还有 JSON 的其他定义，允许标量值.
* 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.
† JSON 可以是 UTF-8、UTF-16LE、UTF-16BE、UFT-32LE 或 UTF-32BE.
† JSON may be in UTF-8, UTF-16LE, UTF-16BE, UFT-32LE, or UTF-32BE.
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