# Page Not Found

The URL `docs/sdks/php/core-library` does not exist.

You might be looking for one of these pages:
- [For Engineers](https://docs.toggly.io/use-cases/for-engineers.md)
- [Performance Metrics](https://docs.toggly.io/metrics/metrics-in-c-.net/performance-metrics.md)
- [Develop continuously, turn on when ready](https://docs.toggly.io/use-cases/for-engineers/develop-continuously-turn-on-when-ready.md)
- [Entity Framework](https://docs.toggly.io/feature-flags/feature-flags-in-c-.net/snapshot-providers/entity-framework.md)
- [Feature Flags in JavaScript](https://docs.toggly.io/feature-flags/feature-flags-in-javascript.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.toggly.io/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.toggly.io/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/use-cases/for-engineers.md`)
- Use `Accept: text/markdown` header for content negotiation