> For the complete documentation index, see [llms.txt](https://www.wptherightway.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.wptherightway.org/routing/rewrite_rules.md).

# Rewrite Rules

* Rewrite rules are based on regular expressions
* Regular expressions map nice URLs on to uglier query var based URLs that can be parsed
* Rewrite rules have priority/order
* Rewrite rules are generated then stored in the database
* Rebuilding rewrite rules is expensive