//判断内容里有没有中文-GBK (PHP)
function check_is_chinese( $ s ) {
    return preg_match('/[/x80-/xff]./', $ s ) ;
}

//获取字符串长度-GBK (PHP)
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 ;
}

//截取字符串字串-GBK (PHP)
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 ) ;
}

//统计字符串长度-UTF8 (PHP)
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 ;
}


//截取字符串-UTF8(PHP)
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 ) ) ;
}


//字符串长度统计-UTF8 [中文3个字节，俄文、韩文占2个字节，字母占1个字节] (Ruby)
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
}

//判断是否是有韩文-UTF-8 (JavaScript)
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 ;
}