Thanks. A transparent pixel is what I'll need - any guidance on that?


On Jul 25, 2005, at 12:37 PM, Matt Darby wrote:

A blank (transparent) pixel would be more difficult, but a simple colored pixel would be easy:

In target file:
<img src=pixel.php>

pixel.php

<?
$im=imagecreate(1,1);
$white=imagecolorallocate($im,255,255,255);
imagesetpixel($im,1,1,$white);
header("content-type:image/jpg");
imagejpeg($im);
imagedestroy($im);
?>

I guess this begs the question, why not use session variables to track activity??

Matt Darby

Brian Dunning wrote:


I want to create a pixel that can be used to track certain activity on the site. I've got it working fine: I just mod_rewrite "spacer.gif" to a PHP app that does what I want it to do; but then I don't know how to actually return a blank pixel. Can anyone point me in the right direction?



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