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<?php
/* ----------------------------------------------*/
/* PNG Counter 1.0 (PHP) */
/* Copyright (c)2001 Chi Kien Uong */
/* URL: http://www.proxy2.de */
/* ----------------------------------------------*/
class png_counter {
var $counter;
var $size;
var $digit_path;
var $config;
function png_counter() {
global $CFG;
$this->config = $CFG;
}
function get_digit_size() {
if (file_exists("$this->digit_path/1.png")) {
$digit_size = getimagesize("$this->digit_path/1.png");
if ($digit_size[2] != "3") {
return false;
} else {
$this->size[0] = $digit_size[0];
$this->size[1] = $digit_size[1];
return $this->size;
}
} else {
return false;
}
}
function check_referer() {
global $VALID;
$is_valid = false;
$referer = getenv("HTTP_REFERER");
if (empty($referer)) {
return false;
} else {
for ($i=0;$i<sizeof($VALID);$i++) {
if (eregi("$VALID[$i]",$referer)) {
$is_valid = true;
break;
}
}
return $is_valid;
}
}
function is_valid_visit() {
global $HTTP_COOKIE_VARS;
if (isset($HTTP_COOKIE_VARS['counter_png'])) {
return false;
} else {
$expire = time()+$this->config['lock_timeout']*60;
setcookie("counter_png", "1", $expire, "/");
return true;
}
}
/*
* function read_counter_db($page) added by
* Félix MARTIN RODRIGUEZ <felix_martin-rdguez@hp.com>
*
*/
function read_counter_db($page) {
$update = false;
/* if the db does not exist error and close */
$link=mysql_connect($this->config['dbhost'],$this->config['dbuser'],$this->config['dbpasswd']);
if (! $link) {
header("Location: error.png");
exit;
}
mysql_select_db($this->config['dbname'],$link);
$sql = "SELECT page,count FROM counter WHERE page = '$page'";
$result=mysql_query($sql,$link);
if (! $result) {
header("Location: error.png");
mysql_close($link);
exit;
}
if ( $row=mysql_fetch_row($result) ) {
$this->counter = $row[1];
} else {
/* if page entry does not exist create record page(txt) count(int) */
$this->counter = 1;
$sql = "INSERT INTO counter (page,count) VALUES ('$page',$this->counter)";
$result=mysql_query($sql,$link);
if (! $result) {
header("Location: error.png");
mysql_close($link);
exit;
}
}
$update = false;
/* increment only if needed */
if ($this->config['block_ip']) {
if ($this->is_valid_visit()) {
$this->counter++;
$update = true;
}
} else {
$this->counter++;
$update = true;
}
/* update only if we have incremented */
if ( $update ) {
$sql = "UPDATE counter SET count=$this->counter WHERE page = '$page'";
$result=mysql_query($sql,$link);
if (! $result){
header("Location: error.png");
mysql_close($link);
exit;
}
mysql_close($link);
}
}
function read_counter_file($page) {
$update = false;
if (!file_exists("./pages/$page.txt")) {
$count_dat = fopen("./pages/$page.txt","w+");
$this->counter = 1;
fwrite($count_dat,$this->counter);
fclose($count_dat);
} else {
$fp = fopen("./pages/$page.txt", "r+");
flock($fp, 2);
$this->counter = fgets($fp, 4096);
flock($fp, 3);
fclose($fp);
$update = false;
if ($this->config['block_ip']) {
if ($this->is_valid_visit()) {
$this->counter++;
$update = true;
}
} else {
$this->counter++;
$update = true;
}
if ($update) {
$fp = fopen("./pages/$page.txt", "r+");
flock($fp, 2);
rewind($fp);
fwrite($fp, $this->counter);
flock($fp, 3);
fclose($fp);
}
}
return $this->counter;
}
function create_png($page,$digit) {
if ($this->config['referer_check']) {
if (!$this->check_referer()) {
header("Location: error.png");
exit;
}
}
$this->digit_path = "./digits/".$digit;
if ($this->get_digit_size()) {
if ($this->config['db']) {
$this->read_counter_db($page);
} else {
$this->read_counter_file($page);
}
$position = 0;
$this->counter = sprintf("%0"."".$this->config['pad'].""."d",$this->counter);
$counter_length = strlen($this->counter);
$total_size = $this->size[0]*$counter_length;
$dest_img = ImageCreate($total_size, $this->size[1]);
for ($i=0;$i<$counter_length;$i++) {
$digit = substr("$this->counter",$i,1);
eval("\$pic".$i."=ImageCreateFromPNG(\"".$this->digit_path."/".$digit.".png\");");
eval("ImageCopy(\$dest_img,\$pic".$i.",".$position.",0,0,0,".$this->size[0].",".$this->size[1].");");
$position += $this->size[0];
}
ImagePNG($dest_img);
} else {
header("Location: error.png");
}
}
}
include ("./config.inc.php");
$page = (!isset($HTTP_GET_VARS['page'])) ? "count" : $HTTP_GET_VARS['page'];
$digit = (!isset($HTTP_GET_VARS['digit'])) ? "scoreboard" : $HTTP_GET_VARS['digit'];
$counter = new png_counter();
$counter->create_png($page,$digit);
?>
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