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Posted by CPD on 12/29/06 06:32
Folks, thanks for all the good tips and discussion. It got my brain
cranking, and it turned out to be a permissions issue. Always took for
granted that perms 446 was sufficient, but somehow on this server, it had to
be 447. Not sure why because the counter file is only read from and written
to, but it works now!
Thanks again, and have a Happy New Year!
"CPD" <no@spam.pls> wrote in message
news:POudnZ4ec9eNgwnYnZ2dnUVZ_t2tnZ2d@comcast.com...
>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 URL http://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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