使用HTML-ENTITIES charset替代mb_convert_encoding

问题描述

我有以下代码：

  mb_convert_encoding（$ string，'HTML-ENTITIES'，'utf-8'） ; 
  

我需要一个替代代码，它完全一样，但不使用任何mb_ *函数在某些环境下，mb扩展名不可用。）

我认为

  utf8_decode（htmlentities（$ string，ENT_COMPAT，'utf-8'））; 
  

应该完全一样，但不幸的是它不会。

解决方案

我玩了一下，发现这很有趣。它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不能正确运行。

如果在结果中运行htmlspecialchars_decode，则与使用mb_convert_encoding完全相同。 / p>

代码：

  $ string ='Test：！ ％& /（）=ÖÄÜöäü<'; 
 echo mb_convert_encoding（$ string，'HTML-ENTITIES'，'utf-8'）。\\\
\\\
; 
 echo htmlspecialchars_decode（utf8_decode（htmlentities（$ string，ENT_COMPAT，'utf-8'，false）））; 
  

这里是上面代码的演示：

在这里没有htmlspecialchars_decode的演示，显示你的问题：

I have the following code:

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).

I thought that

utf8_decode(htmlentities($string, ENT_COMPAT, 'utf-8'));

should do exactly the same, but unfortunately it does not.

解决方案

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.

If you run htmlspecialchars_decode over the result, you get exactly the same as if you would use mb_convert_encoding.

The code:

$string = 'Test:!"$%&/()=ÖÄÜöäü<<';
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

And here a demo without htmlspecialchars_decode, to show your problem:http://sandbox.onlinephpfunctions.com/code/5c4a32bf99aa8fd6246c4a77132a023d32945363

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