this is principle of 1x1 pixel images for tracking users
you can make it look like it is an image, rename your php file to .png, and add proper .htaccess directives on php/apache to execute such file or file extension as php script for example
this is principle of 1x1 pixel images for tracking users
I think a normal pixel tracker (like Facebook's) doesn't do this. It only sends it's own (Facebook's) cookies together with the request, so it doesn't need to "steal" any cookies since this is normal browser behavior (not anymore on Safari)
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there are informations to add :
All true! Here is how people can make the URL have a fake file extension. I'd also add to the "more about this" list that people like to use this technique to track whether you've opened their emails or not.
I think a normal pixel tracker (like Facebook's) doesn't do this. It only sends it's own (Facebook's) cookies together with the request, so it doesn't need to "steal" any cookies since this is normal browser behavior (not anymore on Safari)