URL rewrite with .htaccess make duplicate mysql entries

Question

If rewrite url with .htaccess, all INSERT query with php is performed twice (unwanted duplication)

My .htaccess:

Answer 1

Additionally you can set a primary or unique key in your SQL table (for example, 'title'). That alone would prevent any duplicate entries.

Answer 2

Browsers automatically request the favicon.ico file by default.
But you don't have any favicon.ico file so it is rewritten (rule in your htaccess).
This is why you have a duplicate execute.

Solutions:

1. Add a favicon.ico file
2. Don't INSERT (in index.php) if url requested is favicon
3. Disallow it in your htaccess with a rule