홈페이지 카운터는 클래스 모드로 만들어 봤습니다.

<?
//홈페이지 상단에 아래 부분만 붙이면 됩니다.
========== 시작 ============
include '/Visit.php';

session_start();
$visit = new Visit($dbconn);
$visit->listenVisit();

$visit_total = $visit->getVisit(); //전체 방문자
$visit_today = $visit->getVisit(date('Y'),date('n'),date('j')); //오늘방문자

unset($visit);

========== 끝 ============


아래는 클래스 파일입니다.
========================
- class.Visit.php
========================
/* 방문자 기록 관리 클래스 */
Class Visit
{
var $dbconn;

var $sql;
var $error_msg;

function Visit($dbconn){
$this->dbconn = $dbconn;
}

/*방문자 추출 메소드 */
function getVisit($syear='', $smonth='', $sday=''){
if($syear == '' && $smonth == '' && $sday == ''){
$this->sql = "select sum(hit) as hit from visit "; //총방문자 수
}
else {
$this->sql = "select hit from visit ";

if($syear != "")
$this->sql .= "where syear='$syear' ";

if($smonth != "")
$this->sql .= "and smonth='$smonth' ";

if($sday != "")
$this->sql .= "and sday='$sday' ";
}


$result = mysql_query($this->sql, $this->dbconn);
if($result){
if(mysql_num_rows($result))
return mysql_result($result,0,'hit');
else
return 0;
}
else {
$this->error_msg = mysql_error();
return 0;
}
}


function addVisit($syear, $smonth, $sday){
$this->sql = "insert into visit(syear, smonth, sday, hit)
values('$syear', '$smonth', '$sday', 1)";

$result = mysql_query($this->sql, $this->dbconn);
if($result)
return true;
else {
$this->error_msg = mysql_error();
return false;
}
}

function upVisit(){
$syear = date('Y');
$smonth = date('n');
$sday = date('j');

$is_data = $this->isVisit($syear, $smonth, $sday);

if($is_data)
$this->editVisit($syear, $smonth, $sday);
else
$this->addVisit($syear, $smonth, $sday);
}

function editVisit($syear, $smonth, $sday){
$this->sql = "update visit set hit=hit+1
where syear='$syear' and smonth='$smonth' and sday='$sday'";
$result = mysql_query($this->sql, $this->dbconn);
if($result)
return true;
else {
$this->error_msg = mysql_error();
return false;
}
}

function delVisit($uid){
$this->sql = "delete from visit where uid=$uid";
$result = mysql_query($this->sql, $this->dbconn);
if($result)
return true;
else {
$this->error_msg = mysql_error();
return false;
}
}

function isVisit($syear, $smonth, $sday){
$this->sql = "select uid from visit
where syear='$syear' and smonth='$smonth' and sday='$sday'";
$result = mysql_query($this->sql, $this->dbconn);

if($result){
if(mysql_num_rows($result))
return 1;
else
return 0;
}
else {
$this->error_msg = mysql_error();
return 1;
}
}

function listVisit($pageInfo, $syear='', $smonth='', $sday=''){
$this->sql = "select syear, smonth, sday, hit
from visit ";

if($syear != '') $this->sql .= " where syear='$syear'";
if($smonth != '') $this->sql .= " and smonth='$smonth'";
if($sday != '') $this->sql .= " and sday='$sday'";

$this->sql .= " order by syear desc, smonth desc, sday desc";
$result = mysql_query($this->sql, $this->dbconn);

if($result){
$j=0;
for($i=$pageInfo["first"]; $i<=$pageInfo["last"]; $i++){
$info["num"][$j] = $pageInfo["cnt"] - $i;
$info["syear"][$j] = mysql_result($result,$i,"syear");
$info["smonth"][$j] = mysql_result($result,$i,"smonth");
$info["sday"][$j] = mysql_result($result,$i,"sday");
$info["hit"][$j] = mysql_result($result,$i,"hit");

$j++;
}

return $info;
}
else {
$this->error_msg = mysql_error();
return false;
}
}

/* 20분 기준 방문자 체크 메소드 */
function listenVisit(){
$now_visit_date = mktime(date('H'),date('i'),0,date('m'),date('d'),date('Y'));

if($_COOKIE['visit_date'] != ''){
$old_visit_date = $_COOKIE['visit_date'];
$is_first = false;
}
else {
$old_visit_date = $now_visit_date;
setcookie('visit_date', $now_visit_date);
$is_first = true;
}

$diff_date = $now_visit_date - $old_visit_date;

if($diff_date > 1200 || $is_first == true){ //20분 응답 60 * 20
setcookie('visit_date', $now_visit_date);
$this->upVisit();
}
}

function getCnt($syear='', $smonth='', $sday=''){
$this->sql = "select count(uid) as cnt from visit";

if($syear != '') $this->sql .= " where syear='$syear'";
if($smonth != '') $this->sql .= " and smonth='$smonth'";
if($sday != '') $this->sql .= " and sday='$sday'";

$result = mysql_query($this->sql, $this->dbconn);

if($result){
$cnt = mysql_result($result,0,"cnt");
return $cnt;
}
else {
$this->error_msg = mysql_error();
return 0;
}
}

/* error를 출력하는 메소드 */
/* filter 0-error발생시 출력, 1-무조건 출력 */
function printErr($filter=0){
if($this->error_msg != '' || $filter == 1){
echo '<br>'.$this->sql;
echo '<br>'.$this->error_msg;
}
}
}

아래 테이블을 만든 후 사용해 주세요 ^^;
create table visit (
uid int, auto_increment,
syear int,
smonth int,
sday int,
hit int
}
?><div class='small'>[이 게시물은 관리자님에 의해 2011-10-31 17:12:10 PHP & HTML에서 이동 됨]</div>