//gb2312的话preg_match_all("/[".chr(0xa1)."-".chr(0xff)."]+/", $str, $chinese);echo implode("", $chinese[0]);//utf-8的话preg_match_all("/[\x{4e00}-\x{9fa5}]+/u", $str, $chinese);
从字符中提取出中文
原文：http://www.cnblogs.com/wangtao_20/p/4747408.html
