Primary learning references

The lessons are self-contained. These original documentation sources help you check details and continue learning. Platform policies and technical documentation can change.

• MDN: HTML forms and buttons — structure, controls and labels.
• MDN: web accessibility — accessible structure and interaction.
• PHP: prepared statements — separating query structure from bound values.
• OWASP: CSRF prevention — protecting changing requests.
• Google: AdSense program policies — current publisher rules.

Course examples are fictional practice scenarios. Technical examples illustrate concepts and must be reviewed before use in a production system.