How can CSS files be parsed through htaccess in PHP?

To parse CSS files through htaccess in PHP, you can use the Apache module mod_rewrite to rewrite the URL of the CSS files to a PHP script that will handle the parsing. This allows you to dynamically generate CSS content using PHP before serving it to the browser.

```php
RewriteEngine On
RewriteRule ^styles/(.*\.css)$ parse_css.php?file=$1 [L]
```

In this code snippet, any request for a CSS file in the "styles" directory will be redirected to the "parse_css.php" script with the requested file as a parameter. You can then use PHP to dynamically generate CSS content based on the requested file before serving it to the browser.