~~~ /** * utf8转gbk * @param $utfstr */ function utf8_to_gbk($utfstr) { global $UC2GBTABLE; $okstr = ''; if(empty($UC2GBTABLE)) { $filename = CODETABLEDIR.'gb-unicode.table'; $fp = fopen($filename, 'rb'); while($l = fgets($fp,15)) { $UC2GBTABLE[hexdec(substr($l, 7, 6))] = hexdec(substr($l, 0, 6)); } fclose($fp); } $okstr = ''; $ulen = strlen($utfstr); for($i=0; $i<$ulen; $i++) { $c = $utfstr[$i]; $cb = decbin(ord($utfstr[$i])); if(strlen($cb)==8) { $csize = strpos(decbin(ord($cb)),'0'); for($j = 0; $j < $csize; $j++) { $i++; $c .= $utfstr[$i]; } $c = utf8_to_unicode($c); if(isset($UC2GBTABLE[$c])) { $c = dechex($UC2GBTABLE[$c]+0x8080); $okstr .= chr(hexdec($c[0].$c[1])).chr(hexdec($c[2].$c[3])); } else { $okstr .= '&#'.$c.';'; } } else { $okstr .= $c; } } $okstr = trim($okstr); return $okstr; } ~~~