// 쿠폰번호 생성함수

function get_coupon_id()

{

    $len = 16;

    $chars = "ABCDEFGHJKLMNPQRSTUVWXYZ123456789";

    srand((double)microtime()*1000000);

    $i = 0;

    $str = '';

    while ($i < $len) {

        $num = rand() % strlen($chars);

        $tmp = substr($chars, $num, 1);

        $str .= $tmp;

        $i++;

    }

    $str = preg_replace("/([0-9A-Z]{4})([0-9A-Z]{4})([0-9A-Z]{4})([0-9A-Z]{4})/", "\\1-\\2-\\3-\\4", $str);

    return $str;

} 

$j = 0;

do {

    $cp_id = get_coupon_id();

    $sql3 = " select count(*) as cnt from {$g5['g5_shop_coupon_table']} where cp_id = '$cp_id' ";

    $row3 = sql_fetch($sql3);

    if(!$row3['cnt'])

        break;

    else {

        if($j > 20)

            die('Coupon ID Error');

    }

    $j++;

} while(1);