php的json_encode()始终使用双引号作为字符串定界符吗? [英] Will php's json_encode() always use double quotes as string delimiter?

问题描述

我有一个包含字符串作为值的php关联数组，并将其编码为JSON并将其存储在html-data属性中.那是一些JS读取的.

I have a php associative array containing strings as values and I encode it to JSON and store it in an html-data attribute. That is read by some JS.

到目前为止，一切都很好.

So far so good.

现在，我需要对数据属性使用单引号，否则上下文会切换.

Now, I need to use single quotes for the data attribute, otherwise the context switches.

<section id="settings" data-settings='{"some":"val"}'>
</section>

问题是，我可以依靠php的json_encode()函数来始终对字符串进行双引号编码吗?令人惊讶的是，我似乎找不到任何信息.我只从那些对数组值中的引号有疑问的人那里找到文章.

The question is, can I rely on the json_encode() function of php to encode strings always with double quotes? Surprisingly, I can't seem to find information on this. I only find articles from people having issues with quotes in the array values.

谢谢.

推荐答案

是的，如JSON规范中所定义，定界符将始终为".但是，值可能包含'字符，这会破坏HTML.为简单起见，而不用担心可能会造成问题的原因，请 HTML转义您的价值观！

Yes, as defined in the JSON spec, the delimiter will always be ". However, values may contain ' characters, which would break your HTML. To keep it simple and not worry about what might or mightn't pose an issue, HTML-escape your values!

<section data-settings="<?= htmlspecialchars(json_encode($foo)); ?>"></section>

无论输入什么值或如何对其编码，都保证此方法始终有效.请注意，默认情况下， htmlspecialchars 仅会编码"，而不是'；因此您必须使用"作为HTML中的分隔符(或更改默认的转义行为).

This is guaranteed to work, always, no matter what values you pipe in or how you encode them. Note that htmlspecialchars will by default only encode ", not '; so you must use " as the delimiter in HTML (or change the default escaping behavior).

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