//字串轉換成16進位制functionstr2hex($str){$hex="";for($i=0,$length=mb_strlen($str);$i<$length;$i++){$hex.=dechex(ord($str{$i}));}return$hex;}//16進位制轉換成字串functionhex2str($hex){$str="";$arr=str_split($hex,2);foreach($arras$bit){$str.=chr(hexdec($bit));}return$str;}functiontest(){//utf8字元測試$str="中文";echomb_strlen($str);echo"";$hex=str2hex($str);echo$hex;echo"";$dec=hex2str($hex);echo$dec;echo"";echo"<hr>";//gbk測試$gbkstr=mb_convert_encoding($str,"GBK","UTF-8");echomb_strlen($gbkstr);echo"";$hex=str2hex($gbkstr);echo$hex;echo"";$dec=mb_convert_encoding(hex2str($hex),"UTF-8","GBK");echo$dec;echo"";}