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Explain PDO in PHP.
Updated May 24, 2026
Short answer
PDO provides a consistent interface for database access in PHP.
Deep explanation
PDO supports prepared statements, transaction handling, and multiple database drivers. Prepared statements improve security against SQL injection attacks.
Real-world example
Enterprise applications use PDO for portable and secure database communication.
Common mistakes
- Concatenating user input directly into SQL queries.
Follow-up questions
- What are prepared statements?
- Why use transactions?