PHP Guides

Server log viewer showing captured HTTP referer entries

Referer Tracker Explained: How to Capture, Validate, and Report Referrer Data Safely

Theo Marlowe / 19.05.2026

Learn what the HTTP Referer header is, what you can’t reliably track, and how to capture, normalize, validate, and report referrer data safely without bloated logs or misleading numbers.

Local PHP test page showing the same sample input rendered as escaped HTML text, a URL-encoded query parameter, and an escaped HTML attribute value with workflow callouts.

PHP Guides

Secure PHP Input Handling: Encoding, URL Encoding, and Safe Data Output (Practical Checklist)

June Park / 16.05.2026

A practical PHP checklist for safe input handling: when to URL-encode, when to escape HTML, how to avoid double-encoding, and how to render output safely in each context.