How can the use of mod_rewrite with the L flag impact the functionality of a PHP application?

Using the L flag in mod_rewrite can impact the functionality of a PHP application by causing the server to stop processing further rewrite rules after the current one is applied. This can lead to unintended consequences, such as certain URLs not being rewritten as expected or causing infinite loops. To solve this issue, you can use the QSA flag along with the L flag to ensure that all query parameters are passed along with the rewritten URL.

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?url=$1 [QSA,L]