What’s the best way to prevent SQL injection in form submissions?
Asked on Sep 13, 2025
Answer
To prevent SQL injection in form submissions, the best practice is to use prepared statements with parameterized queries. This approach ensures that user input is treated as data rather than executable code.
<!-- BEGIN COPY / PASTE -->
// Example using PDO in PHP
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->execute(['username' => $inputUsername]);
$user = $stmt->fetch();
<!-- END COPY / PASTE -->Additional Comment:
- Always validate and sanitize user inputs even when using prepared statements.
- Avoid constructing SQL queries directly with user input.
- Use ORM libraries that inherently protect against SQL injection.
✅ Answered with Security best practices.
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