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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?

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