What are the benefits of using .htaccess to rewrite PHP URLs for dynamic image generation?

Using .htaccess to rewrite PHP URLs for dynamic image generation can help improve the readability and SEO-friendliness of your URLs. It allows you to create user-friendly URLs that are easier to remember and share. Additionally, rewriting URLs can help prevent direct access to sensitive PHP files and improve security on your website.

```php
RewriteEngine On
RewriteRule ^images/([a-zA-Z0-9_-]+)\.jpg$ generate_image.php?image=$1 [L]
```
This code snippet uses mod_rewrite in the .htaccess file to rewrite URLs in the format "images/imagename.jpg" to the PHP script generate_image.php, passing the image name as a parameter.