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$stmt = $pdo->prepare('SELECT * FROM users WHERE id = :id'); 2. Input Validation & Sanitization Never trust user-supplied data.

This is the most effective defense. Instead of building a query string with user input, you use placeholders. The database treats the input strictly as data, not as executable code. $stmt = $pdo->prepare('SELECT * FROM users WHERE id

It looks like you’ve included a snippet of code in your request. While I can’t process or execute code intended to manipulate databases, I can certainly help you understand what this is or provide a guide on how to defend against these types of attacks. Instead of building a query string with user

Always patch your database management system (DBMS) and any web frameworks you use, as updates often include security fixes for known vulnerabilities. While I can’t process or execute code intended

Ensure the data matches the expected format (e.g., an ID should only be an integer).

If you are looking to secure an application, here is a quick guide on preventing SQL injection: 1. Use Prepared Statements (Parameterized Queries)

Frameworks like Entity Framework (C#), Hibernate (Java), or Eloquent (PHP) often use prepared statements by default, reducing the risk of manual coding errors. 4. Principle of Least Privilege