htmlentities()函数 中文转成乱码问题

htmlentities — Convert all applicable characters to HTML entities

string htmlentities    ( string $string   [, int $flags = ENT_COMPAT | ENT_HTML401   [, string $encoding = 'UTF-8'   [, bool $double_encode = true  ]]] )

对于中文如果不指定第三个参数的话，中文就被转成乱码，解决方法就是把第二、第三个参数（UTF-8或GBK）都指定了。

echo htmlentities("高振安",ENT_NOQUOTES,GB2312)
echo htmlentities("高振安",ENT_NOQUOTES,"utf-8")

附 第二个参数可选值：

ENT_COMPATWill convert double-quotes and leave single-quotes alone.ENT_QUOTESWill convert both double and single quotes.ENT_NOQUOTESWill leave both double and single quotes unconverted.ENT_IGNORE            Silently discard invalid code unit sequences instead of returning            an empty string. Using this flag is discouraged as it             ? may have security implications.            ENT_SUBSTITUTE            Replace invalid code unit sequences with a Unicode Replacement Character            U+FFFD (UTF-8) or &#FFFD; (otherwise) instead of returning an empty string.            ENT_DISALLOWED            Replace invalid code points for the given document type with a            Unicode Replacement Character U+FFFD (UTF-8) or &#FFFD;            (otherwise) instead of leaving them as is. This may be useful, for            instance, to ensure the well-formedness of XML documents with            embedded external content.            ENT_HTML401            Handle code as HTML 4.01.            ENT_XML1            Handle code as XML 1.            ENT_XHTML            Handle code as XHTML.            ENT_HTML5            Handle code as HTML 5.