public static function utf8_to_gbk($utfstr) {
return iconv("utf-8", "gbk//IGNORE", $utfstr);
}
static function gbk_to_utf8($gbstr) {
return mb_convert_encoding($gbstr, "utf-8", "gbk");
}
原文：http://www.cnblogs.com/buxiangxin/p/7439936.html