php 使用 HTML-ENTITIES 字符集替代 mb_convert_encoding
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Alternative to mb_convert_encoding with HTML-ENTITIES charset
提问by Simon
I have the following code:
我有以下代码：
mb_convert_encoding($string, 'HTML-ENTITIES', 'utf-8');
I need to have an alternative code which does exactly the same but does not use any mb_* functions (the mb extension is not available on some environments).
我需要一个完全相同的替代代码，但不使用任何 mb_* 函数（mb 扩展在某些环境中不可用）。
I thought that
我认为
utf8_decode(htmlentities($string, ENT_COMPAT, 'utf-8'));
should do exactly the same, but unfortunately it does not.
应该完全相同，但不幸的是它没有。
回答by Green Black
I played around a bit, and find this very interesting. It seems like the second part also runs "htmlspecialchars". Must be some bug in mb_convert_encoding, as htmlentities is not run correctly.
我玩了一会儿，发现这很有趣。似乎第二部分也运行“htmlspecialchars”。必须是 mb_convert_encoding 中的一些错误，因为 htmlentities 没有正确运行。
If you run htmlspecialchars_decode over the result, you get exactly the same as if you would use mb_convert_encoding.
如果您对结果运行 htmlspecialchars_decode，您将获得与使用 mb_convert_encoding 完全相同的结果。
The code:
编码：
$string = 'Test:!"$%&/()=??ü??ü<<';
echo mb_convert_encoding($string, 'HTML-ENTITIES', 'utf-8')."\n\n";
echo htmlspecialchars_decode(utf8_decode(htmlentities($string, ENT_COMPAT, 'utf-8', false)));
Here a demo of the code above: http://sandbox.onlinephpfunctions.com/code/715acade3b8337d9c9e48e58deee2a237015c259
这里是上面代码的演示：http: //sandbox.onlinephpfunctions.com/code/715acade3b8337d9c9e48e58deee2a237015c259
And here a demo without htmlspecialchars_decode, to show your problem: http://sandbox.onlinephpfunctions.com/code/5c4a32bf99aa8fd6246c4a77132a023d32945363
这里有一个没有 htmlspecialchars_decode 的演示，以显示您的问题：http: //sandbox.onlinephpfunctions.com/code/5c4a32bf99aa8fd6246c4a77132a023d32945363
