htmlentities跟htmlspecialchars的区别

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两个函数在格式化带有英文字符的html代码的时候基本没啥问题，但是htmlentities对中文字符也不放过，这样得出来的结果是中文字符部分变为一堆乱码。

The translations performed are:

‘&’ (ampersand) becomes ‘&’

‘”‘ (double quote) becomes ‘”‘ when ENT_NOQUOTES is not set.

”’ (single quote) becomes ”’ only when ENT_QUOTES is set.

‘<’ (less than) becomes ‘<’

‘>’ (greater than) becomes ‘>’


htmlspecialchars只转化上面这几个html代码，而htmlentities却会转化所有的html代码，连同里面的它无法识别的中文字符也给转化了。

<?php

$str='<a href="test.html">测试页面</a>';
echo htmlentities($str);

//&lt;a href=&quot;test.html&quot;&gt;&sup2;&acirc;&Ecirc;&Ocirc;&Ograve;&sup3;&Atilde;&aelig;&lt;/a&gt;

echo htmlspecialchars($str);

//&lt;a href=&quot;test.html&quot;&gt;测试页面&lt;/a&gt;

?>