In standard web development, a PHP file can act as an image. By using the PHP GD Library , developers can create, resize, or watermark images on the fly.
: A security filter might only check the last extension ( .jpeg ) and assume the file is a safe image. However, if the web server (like Apache) is misconfigured, it might execute the file as a PHP script because it sees the .php part. image.php.jpeg
If you are writing a script to handle these files, you will likely use these Official PHP Manual functions: imagejpeg - Manual - PHP In standard web development, a PHP file can act as an image
: Sometimes, developers append .jpeg to the end of a .php file (resulting in image.php.jpeg ) to trick some browsers or systems into treating the file as a static image while it remains an executable script. Security Risks (File Upload Vulnerabilities) However, if the web server (like Apache) is
The file extension image.php.jpeg is a classic example of a . Attackers use this to bypass security filters on websites that allow file uploads.
: A script (e.g., image.php ) fetches data, processes an image resource, and sends a header like Content-Type: image/jpeg to the browser.