What are common issues when using mod rewrite in PHP for dynamic pages?

Common issues when using mod rewrite in PHP for dynamic pages include incorrect regular expressions in the rewrite rules, causing the URLs to not match properly, leading to 404 errors. To solve this, ensure that the regular expressions in the rewrite rules accurately capture the URL patterns that need to be rewritten.

RewriteEngine On
RewriteRule ^products/([0-9]+)/?$ product.php?id=$1 [L]