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| <?php
class Logger
{
private $logFile;
private $initMsg;
private $exitMsg;
function __construct($file)
{
$this->initMsg = "#--session started--#\n";
$this->exitMsg = "#--session end--#\n";
$this->logFile = "/tmp/natas26_" . $file . ".log";
$fd = fopen($this->logFile, "a+");
fwrite($fd, $this->initMsg);
fclose($fd);
}
function log($msg)
{
$fd = fopen($this->logFile, "a+");
fwrite($fd, $msg . "\n");
fclose($fd);
}
function __destruct()
{
$fd = fopen($this->logFile, "a+");
fwrite($fd, $this->exitMsg);
fclose($fd);
}
}
function showImage($filename)
{
if (file_exists($filename))
echo "<img src=\"$filename\">";
}
function drawImage($filename)
{
$img = imagecreatetruecolor(400, 300);
drawFromUserdata($img);
imagepng($img, $filename);
imagedestroy($img);
}
function drawFromUserdata($img)
{
if (
array_key_exists("x1", $_GET) && array_key_exists("y1", $_GET) &&
array_key_exists("x2", $_GET) && array_key_exists("y2", $_GET)
) {
$color = imagecolorallocate($img, 0xff, 0x12, 0x1c);
imageline(
$img,
$_GET["x1"],
$_GET["y1"],
$_GET["x2"],
$_GET["y2"],
$color
);
}
if (array_key_exists("drawing", $_COOKIE)) {
$drawing = unserialize(base64_decode($_COOKIE["drawing"]));
if ($drawing)
foreach ($drawing as $object)
if (
array_key_exists("x1", $object) &&
array_key_exists("y1", $object) &&
array_key_exists("x2", $object) &&
array_key_exists("y2", $object)
) {
$color = imagecolorallocate($img, 0xff, 0x12, 0x1c);
imageline(
$img,
$object["x1"],
$object["y1"],
$object["x2"],
$object["y2"],
$color
);
}
}
}
function storeData()
{
$new_object = array();
if (
array_key_exists("x1", $_GET) && array_key_exists("y1", $_GET) &&
array_key_exists("x2", $_GET) && array_key_exists("y2", $_GET)
) {
$new_object["x1"] = $_GET["x1"];
$new_object["y1"] = $_GET["y1"];
$new_object["x2"] = $_GET["x2"];
$new_object["y2"] = $_GET["y2"];
}
if (array_key_exists("drawing", $_COOKIE)) {
$drawing = unserialize(base64_decode($_COOKIE["drawing"]));
} else {
$drawing = array();
}
$drawing[] = $new_object;
setcookie("drawing", base64_encode(serialize($drawing)));
}
session_start();
if (
array_key_exists("drawing", $_COOKIE) ||
(array_key_exists("x1", $_GET) && array_key_exists("y1", $_GET) &&
array_key_exists("x2", $_GET) && array_key_exists("y2", $_GET))
) {
$imgfile = "img/natas26_" . session_id() . ".png";
drawImage($imgfile);
showImage($imgfile);
storeData();
}
?>
|