image does not appear

[muadzir]

i'm trying to load image (graphs) using header("Content-type: image/gif") but before loading this there are some coding lines to read data from a file. the data then were dumped into array.

my problem is, previously I was using IIS as the web server it worked fine. but when I switched to apache webserver the image (graphs) did not appear.

why? is there any problem with my apache settings?

[jesus_hairdo]

Can you post some of the code you are using and are you getting an error messages or just nothing displayed??

[muadzir]

my code goes like this :

<?
$infile = fopen("mem.dat", "r");
if (!$infile)
{
echo "File not found! Please copy the required file into the directory!<br><br>";
exit;
}

$h = 0;
while(!feof($infile))
{
$myline = fgets($infile ,150);
$spl_myline = explode($myline,",");

//copy slitted string to iData and strData
$iData[$h] = intval($spl_myline[0]);
$strData[$h] = strval(trim($spl_myline[6]));
$h++;
}

fclose($infile);

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

$max_y = max($iData);
$max_x = 600;

$imageHeight = 700;
$imageWidth = $max_x + 20;

$y_interval = 10;

$x_scale = $max_x / ($h+1);

$y_scale = 500 / $max_y;

$left_margin = 50;
$bottom_margin = 100;
//end variable declarations

$image = imagecreate($imageWidth, $imageHeight);

$colorRed = imagecolorallocate($image, 255, 0, 0);
$colorBlack = imagecolorallocate($image, 0, 0, 0);
$colorBlue = imagecolorallocate($image, 0, 0, 255);
$colorWhite = imagecolorallocate($image, 255, 255, 255);
$colorGrey = imagecolorallocate($image, 200, 200, 200);

imagefill($image, 0, 0, $colorWhite);

//y-axis label
imagestringup($image, 3, $left_margin/2, $imageHeight/2,
"Active Memory (KBytes)", $colorBlue);

//x-axis label
imagestring($image, 3, ($imageWidth - $left_margin) /2,
($imageHeight-$bottom_margin)+($bottom_margin/2) / 2,
"Date", $colorBlue);

this might be suffice I think, previously it looks fine with IIS, but when I switched to Apache nothing appears.