UTF-8$str = mb_convert_encoding($str, 'UTF-8', 'GB2312');preg_match_all('/[\x{4e00}-\<p style="color:transparent">。本文来源gao!%daima.com搞$代*!码网1</p><cite>搞代gaodaima码</cite>x{9fff}]+/u', $str, $matches);$str = join('', $matches[0]);//转换 UTF-8 -> GB2312$str = mb_convert_encoding($str, 'GB2312', 'UTF-8'); echo $str; //输出 中文字符?>