image problems

[hwttdz]

I'm trying to display generated images produced from the same file but each image is slightly different. The php that produces the image references a database and plots dots where there are locations in the database. The locations all have a type assigned and I'm trying to plot those with type one on one plot and those with type two on another plot. So far I have tried using sessions, but both images seem to be generated using the second value, in this case 2.

$_SESSION['type']=1;
?>
<IMG SRC="imgtest3.php">
<?php
$_SESSION['type']=2;
?>
<IMG SRC="imgtest3.php">
<br>
<?php

I tried putting a static variable in imgtest3.php but that didn't seem to do anything useful.

Now I'm trying

?>
<IMG SRC="imgtest3.php?type=1">
<IMG SRC="imgtest3.php?type=2">
<br>
<?php

Which seems to plot the dots in the correct locations but it wrecks the background image. The background should be white but if I do this it becomes almost all black and shows some sort of interference pattern at the top of the image. What am I doing wrong? Thanks.

<?php
//ini_set("display_errors", "On");
echo("this is text before the picture <br>");
?>
<IMG SRC="imgtest3.php?type=2">
<IMG SRC="imgtest3.php?type=2">
<br>
<?php
echo("this is text after the picture");
?>

imgtest3.php

<?php
//start of main
header("Content-type: text/html");
//ini_set("display_errors", "On");
$link = @mysql_connect('localhost', 'rob', 'mypass') or die("Could not connect to MySQL");
$db = @mysql_select_db('temp2',$link) or die("Could not select database");
$type=$_GET['type'];
$image=drawimage($link,$type);
imagepng($image);
//end of main
function drawimage($link,$i)
{
	$image = imagecreatefromgif("map.gif");

$query = "SELECT * FROM table2ll WHERE status=1 AND type=".$i; //select green sites
$result = @mysql_query($query,$link) or die("Could not submit query1");
makedots($image, $result, 1);

$query = "SELECT * FROM table2ll WHERE status=2 AND type=".$i;//select red sites
$result = @mysql_query($query,$link) or die("Could not submit query");
makedots($image, $result,2);

$query = "SELECT * FROM table2ll WHERE status=3 AND type=".$i;//select clear sites
$result = @mysql_query($query,$link) or die("Could not submit query");
makedots($image, $result,3);

return($image);
}
?>

The makedots function works correctly, I've tested it independently and it worked on previous steps.

[dhodge]

I'm not an image generation expert but shouldn't your imgtest3.php page have the header

header("Content-type: image/gif");

then at the end just use the imagegif() function to print it.

[hwttdz]

Also something I didn't mention but is likely significant is that if I eliminate either one of the images

<?php
//ini_set("display_errors", "On");
echo("this is text before the picture <br>");
?>
<IMG SRC="imgtest3.php?type=2">
<br>
<?php
echo("this is text after the picture");
?>

And just leave that much with type set to either 1 or 2 it generates the image correctly.

Changing the headers and the print image type didn't seem to have any effect, thanks for the suggestion though.

Also if I set the type in the imgtest3.php calls to the same number it doesn't seem to have a problem.

[hwttdz]

I have narrowed down the problem to somehow being related to the $_GET variables. Right now my code is

<?php
ini_set("display_errors", "On");
echo("this is text before the picture <br>");
?>
<IMG SRC="ita.php?xzyz=1">
<IMG SRC="ita.php?xzyz=2">
<br>
<?php
echo("this is text after the picture");
?>

and ita.php is

<?php
//start of main
header("Content-type: image/gif");
ini_set("display_errors", "Off");
$image=drawimage();
imagegif($image);
//end of main

function drawimage()
{
	$image = imagecreatefromgif("map.gif");
	return($image);
}
?>

So you can see the get variables do nothing. So I don't see why they make it crash.

[hwttdz]

I still have a problem and no idea where it is coming from. Someone at another board said this exact code worked on their server, which makes me think it might be a configuration problem, I'm using localhost, but I really don't know much about configuration.

<IMG SRC="ita.php?a=1" />
<IMG SRC="ita.php?a=2" />

ita.php

<?php
header("Content-type: image/jpeg");
$image=imagecreatefromgif("map.gif");
imagejpeg($image);
imagedestroy($image);
?>