PHP中GBK和UTF8编码处理(中文,韩文)
一、编码范围
1.gbk (gb2312/gb18030)
x00-xff gbk双字节编码范围
x20-x7f ascii
xa1-xff 中文
x80-xff 中文
2.utf-8 (unicode)
u4e00-u9fa5 (中文)
x3130-x318f (韩文)
xac00-xd7a3 (韩文)
u0800-u4e00 (日文)
ps: 韩文是大于[u9fa5]的字符
正则例子:
preg_replace("/([x80-xff])/","",$str);
preg_replace("/([u4e00-u9fa5])/","",$str);
二、代码例子
-
- function check_is_chinese($s){
- return preg_match('/[x80-xff]./', $s);
- }
-
- function gb_strlen($str){
- $count = 0;
- for($i=0; $i<strlen($str); $i++){
- $s = substr($str, $i, 1);
- if (preg_match("/[x80-xff]/", $s)) ++$i;
- ++$count;
- }
- return $count;
- }
-
- function gb_substr($str, $len){
- $count = 0;
- for($i=0; $i<strlen($str); $i++){
- if($count == $len) break;
- if(preg_match("/[x80-xff]/", substr($str, $i, 1))) ++$i;
- ++$count;
- }
- return substr($str, 0, $i);
- }
-
- function utf8_strlen($str) {
- $count = 0;
- for($i = 0; $i < strlen($str); $i++){
- $value = ord($str[$i]);
- if($value > 127) {
- $count++;
- if($value >= 192 && $value <= 223) $i++;
- elseif($value >= 224 && $value <= 239) $i = $i + 2;
- elseif($value >= 240 && $value <= 247) $i = $i + 3;
- else die('not a utf-8 compatible string');
- }
- $count++;
- }
- return $count;
- }
-
-
- function utf8_substr($str,$position,$length){
- $start_position = strlen($str);
- $start_byte = 0;
- $end_position = strlen($str);
- $count = 0;
- for($i = 0; $i < strlen($str); $i++){
- if($count >= $position && $start_position > $i){
- $start_position = $i;
- $start_byte = $count;
- }
- if(($count-$start_byte)>=$length) {
- $end_position = $i;
- break;
- }
- $value = ord($str[$i]);
- if($value > 127){
- $count++;
- if($value >= 192 && $value <= 223) $i++;
- elseif($value >= 224 && $value <= 239) $i = $i + 2;
- elseif($value >= 240 && $value <= 247) $i = $i + 3;
- else die('not a utf-8 compatible string');
- }
- $count++;
- }
- return(substr($str,$start_position,$end_position-$start_position));
- }
-
-
- def utf8_string_length(str)
- temp = cgi::unescape(str)
- i = 0;
- j = 0;
- temp.length.times{|t|
- if temp[t] < 127
- i += 1
- elseif temp[t] >= 127 and temp[t] < 224
- j += 1
- if 0 == (j % 2)
- i += 2
- j = 0
- end
- else
- j += 1
- if 0 == (j % 3)
- i +=2
- j = 0
- end
- end
- }
- return i
- }
-
-
- function checkkoreachar(str) {
- for(i=0; i<str.length; i++) {
- if(((str.charcodeat(i) > 0x3130 && str.charcodeat(i) < 0x318f) || (str.charcodeat(i) >= 0xac00 && str.charcodeat(i) <= 0xd7a3))) {
- return true;
- }
- }
- return false;
- }
-
-
- function check_chinese_char(s){
- return (s.length != s.replace(/[^x00-xff]/g,"**").length);
- }