Re: PHP-gen'd images won't display in HTML
- From: "Ehsan" <haque.ehsan@xxxxxxxxx>
- Date: 28 Dec 2006 14:23:17 -0800
Hi,
I've tested your script on my localhost. It worked perfectly fine with
<img> tag carrying src='myimage.php'. As per zorro's suggestion I added
one blank space on top of the file, before <?php, and it failed. So
please make there is no blank space or any sort of output. As you are
calling header() you should remember it cannot have any kind of output
before you call functions like header(), session_start().
Thank you.
Ehsan
http://ehsan.bdwebwork.com/
On Dec 28, 2:42 pm, "CPD" <n...@xxxxxxxx> wrote:
I have an image-generating script myimage.php that's worked and that I've
used for years. All it does is increment a counter file and output a single
pixel in the color I provide. But on one particular web server I uploaded
to, the behavior is strange.
If I enter the URLhttp://www.domain.ext/myimage.php, the picture is
displayed as expected. But if I insert the script into HTML, like <img
src="myimage.php">, it fails to display and I get the broken image icon,
instead.
This has never happened before, but I do not know enough about PHP builds
and web server settings to figure this out.
Any suggestions? Thanks for any help!
Here's the code, if necessary:
$filename = trim($_GET['filename']);
$color = (trim($_GET['color']) == "") ? "000000" : trim($_GET['color']);
$count = '0';
$file_last_mod = 0;
// Set up filename whether or not provided
if(strlen($filename)) {
$filename .= ".count";}else {
$fname_end = strrpos($script_name, ".");
$fname_end = ($fname_end === false) ? strlen($script_name) :
$fname_end - 1;
$slash_pos = strrpos($script_name, "/");
$fname_start = ($slash_pos === false) ? 0 : $slash_pos + 1;
$script_name = (!strlen($filename)) ? $HTTP_SERVER_VARS['SCRIPT_NAME'] :
$filename;
$filename = substr($script_name, $fname_start, $fname_end - $slash_pos)
. ".count";
}// open and read file if it exists
if (file_exists($filename)) {
$file_last_mod = filemtime($filename);
$count = file_get_contents($filename);
}// increment count
$count += 1;
// reopen file and write new count
$handle = fopen($filename, "w");
fwrite($handle, $count);
fclose($handle);
// Generate a 1 x 1 pixel image
$im = @imagecreate(1, 1)
or die("<!-- Cannot Initialize new GD image stream -->");
// Set up color if not provided
if (!strlen(trim($color))) $color = "000000";
// Set image color
$red = 0 + base_convert(substr($color, 0, 2), 16, 8);
$green = 0 + base_convert(substr($color, 2, 2), 16, 8);
$blue = 0 + base_convert(substr($color, 4, 2), 16, 8);
$img_color = imagecolorallocate($im, $red, $green, $blue);
// Output the created image according to available GD image support
if (function_exists("imagegif")) {
header("Content-type: image/gif");
imagegif($im);} elseif (function_exists("imagejpeg")) { header("Content-type: image/jpeg");
imagejpeg($im);} elseif (function_exists("imagepng")) { header("Content-type: image/png");
imagepng($im);} elseif (function_exists("imagewbmp")) { header("Content-type: image/vnd.wap.wbmp");
imagewbmp($im);} else { die("<!-- No image support on this PHP server -->");
}
.
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