如何转义<code> tag with php htmlentities, even if tag has attributes

Question

So someone actually posted a fantastic solution here How can I escape all code within <code></code> tags to allow people to post code?

The problem is that this only works if it's <code></code>. However, this breaks with <code id="lol"></code for example, since it contains an attribute. How can I account for this, in order to strictly escape strings inside the code tag, whether or not it has any attributes.

I apologize if there is an obvious solution to this. Regexes give me nightmares.

Edit

As I explained in the question initially, the post that is supposedly a duplicate does not account for the <code> tag with something like a class or any other attributes.

Answer 1

尽管我在上面发表评论，但我仍会努力为您提供正则表达式。但是，我强调 不 建议使用正则表达式，而是使用HTML解析器。

你的正则表达式应该看起来像这样：

<\s*code(.*?)>(.+?)<\s*\/code\s*>

稍微分解一下，

\s*匹配零个或多个空白字符。

code匹配文字字符串＆＃34; code＆＃34;。

.*?是零个或多个字符的 lazy 匹配。它将匹配所有内容（如果有的话）直到​​标记的末尾。

(.+?)是捕获组，包含一个或多个字符的延迟匹配。如果不出意外，您的<code>标签将永远不会完全空白（因为它们之间必须至少有一个字符）。

最后，<\s*\/code\s*>匹配结束标记，可能包含空格。请注意，斜杠（/）字符是转义的，因为它必须在阳光下几乎所有的正则表达式中。