I would like when accessing the url https://www.italinea.com.br/uploads/jx5rufam7adfwd75pi6c.jpg, which is an existing file on the server, open the php file https://www.italinea.com.br/image.php. Which htaccess rule do I use?
I tried to use:
RewriteRule ^(.+)\.jpg image.php [L,QSA]
But as it is an existing file, it opens the image and not the .php file
RewriteRule ^(.+)\.jpg image.php [L,QSA]
This is the right idea and should "work", although it could be simplified a bit. And it is rather generic, so matches every .jpg request.
If this is not working then either:
You have a conflict with other directives in the .htaccess file (the order of directives can be important).
You have a front-end proxy that is serving your static content. This is a problem if the URL being requested maps to a physical file as the application server (ie. .htaccess) is then completely bypassed.
If this is the case then see my answer to the following related question:
WordPress: can't achieve direct image access redirection via .htaccess