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• 2. Why This Primer Exists
• 6. Authorization & Access Control — Keeping Capabilities in Their Lane
• 8. Database Safety — Parameterization, Boundaries, and Least Privilege
• 3. Escaping and Output Encoding — Keeping Untrusted Data in Its Place
• 2. Input Validation & Data Shape — The First Security Boundary
• 7. Handling Secrets — Keys, Tokens, and Environment Boundaries
• 4. Password Handling — Modern, Safe, and Simple
• 1. Safe Defaults in Modern PHP — A Foundation for Secure Code
• 5. Secure Session Practices — Predictable, Boundaried, and Safe
• 9. Security Fundamentals — A Calm Summary
• PHP Primer for the AI Era

• 1. Safe Defaults in Modern PHP — A Foundation for Secure Code
• 2. Input Validation & Data Shape — The First Security Boundary
• 3. Escaping and Output Encoding — Keeping Untrusted Data in Its Place
• 4. Password Handling — Modern, Safe, and Simple
• 5. Secure Session Practices — Predictable, Boundaried, and Safe
• 6. Authorization & Access Control — Keeping Capabilities in Their Lane
• 7. Handling Secrets — Keys, Tokens, and Environment Boundaries
• 8. Database Safety — Parameterization, Boundaries, and Least Privilege
• 9. Security Fundamentals — A Calm Summary