8. Custom CSS, PHP & Hooks
This module is the bridge between site builder work and developer work: small, controlled code changes that improve UX without creating maintenance risk.
What You'll Be Able To Do
- Place custom CSS safely (scope and intent)
- Add PHP customizations via hooks and template tags
- Debug issues without guesswork
flowchart LR
A[CSS tweaks] --> B[Hooked PHP]
B --> C[Debugging]
Lessons
| Lesson | Outcome |
|---|---|
| Custom CSS Integration | Place CSS in the right layer and avoid global breakage |
| PHP Customizations | Add guarded, escaped PHP changes |
| Hook Elements (GP Premium) | Use UI-driven hooks with clear rules |
| Shortcodes & Template Tags | Build reusable outputs without duplicated markup |
| Debugging Custom Code (OLS) | Diagnose issues systematically with logs and isolation |
Completion Checklist
| Check | Done when... |
|---|---|
| CSS | Styles are scoped and do not leak globally |
| PHP | Customizations are guarded and escaped |
| Debug | You have a repeatable approach to tracing issues |
What's Next
- Continue to: SEO, Schema & Accessibility