I have a site that has a place for upload files by I want to prevent users for upload files by .png and .gif files. I test these config :

<FilesMatch "\.(png|gif)$">
allow from all
</FilesMatch>

<FilesMatch "\.(?<!png|gif)$">
deny from all
</FilesMatch>

Apache restrict file access to specific extensions, and allow directory index file to work also

but still can upload these extensions in my site. could you please help?