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// ¾ÆÀ̵ðüũ
function userid($str)
{
        $pattern = "/^[\200-\377a-zA-Z0-9]{1}[\200-\377a-zA-Z0-9_-]{2,11}\$/";
        return preg_match($pattern,$str);
}

// À̸ÞÀÏ Ã¼Å©
function email($email)
{
        $pattern = "/^[_a-zA-Z0-9-\\.]+@[\\.a-zA-Z0-9-]+\\.[a-zA-Z]+\$/";
        return preg_match($pattern,$email);
}

// ´Ð³×ÀÓüũ
function nickname($nick) {
        $pattern = "/^[\200-\377a-zA-Z0-9_-]{2,12}\$/";
        return preg_match($pattern,$nick);
}

// ÇÑ±ÛÆ÷ÇÔ¿©ºÎ
function has_hangul($str) {
        $pattern = "/[\200-\377]/";
        return preg_match($pattern,$str);
}

// ¿µ¹®ÀÚ,¼ýÀڷθ¸ µÇ¾î ÀÖ´ÂÁö
function engnumber_only($str) {
        $pattern = "/^[a-zA-Z0-9]+\$/";
        return preg_match($pattern,$str);
}

// ¿µ¹®Àڷθ¸ µÇ¾î ÀÖ´ÂÁö
function eng_only($str) {
        $pattern = "/^[a-zA-Z]+\$/";
        return preg_match($pattern,$str);
}

// Çѱ۷θ¸ µÇ¾î ÀÖ´ÂÁö
function han_only($str) {
        $pattern = "/^[\200-\377]+\$/";
        return preg_match($pattern,$str);
}

// ¼ýÀڷθ¸ µÇ¾î ÀÖ´ÂÁö
function number_only($str) {
        $pattern = "/^[0-9]+\$/";
        return preg_match($pattern,$str);
}

// °ø¹é ÀÎÁö È®ÀÎ
function is_empty($str) {
        $str=trim($str);
        return ((strlen($str)===0)?true:false);
}

// ÁֹιøÈ£ üũ
function jumin($jumin,$jumin_rtn='')
{
        $pattern = "/^([0-9]{6})-?([0-9]{7})\$/";
        if(!preg_match($pattern,$jumin,$tmp)) return false;
        if($jumin_rtn!='')
                $GLOBALS[$jumin_rtn]=$tmp[1].'-'.$tmp[2];
        $num=$tmp[1].$tmp[2];

        $sum = 0;
        $last = $num[12];
        $bases = "234567892345";
        for($i=0;$i<12;$i++) {
                        $sum += ($num[$i]) * ($bases[$i]);
        }
        $mod = $sum % 11;
        return ((11 - $mod) % 10 == $last);
}

// ÇѱÛ(Ư¼ö¹®ÀÚ) °í·ÁÇÑ ±ÛÀÚ¼ö ¼¼±â
function han_strlen($str) {
        $len = 0;
        for($j=0; $j<strlen($str) ; $j++) {
                $chr = ord($str[$j]);
                if($chr > 128) {
                        $j++;
                        $chr = ord($str[$j]);
                        $len++;
                        if($chr <= 128) {
                                $len++;
                        }
                } else {
                        $len++;
                }
        }
        return $len;                
}

// ±ÛÀÚ¼ö Å©±â üũ
function strlen_chk($str,$min=NULL,$max=NULL) {
        $str=trim($str);
        $len=strlen($str);
        if($min !== NULL)
                if($min > $len)
                        return false;

        if($max !== NULL)
                if($max < $len)
                        return false;
        
        return true;        
}
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