What are potential issues with mod_rewrite in PHP forums and how can they impact string manipulation?

Potential issues with mod_rewrite in PHP forums include incorrect redirection rules leading to broken links, causing issues with URL rewriting and string manipulation. To solve this, ensure that the mod_rewrite rules are correctly configured and tested to avoid any unexpected behavior.

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