All Select Null,null,null,char(113)||char(122)||char(106)||char(112)||char(113)||char(110)||char(117)||char(68)||char(76)||char(114)||char(89)||char(111)||char(84)||char(100)||char(85)||char(75)||char(116)||char(73)||char(83)||char(105)||char | -6207' Union

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

Ensure the data matches the expected format (e.g., an ID should only be an integer). $stmt = $pdo->prepare('SELECT * FROM users WHERE id

Always patch your database management system (DBMS) and any web frameworks you use, as updates often include security fixes for known vulnerabilities. $stmt = $pdo->prepare('SELECT * FROM users WHERE id

Ensure the database user account used by your application only has the permissions it absolutely needs. For example, a web app shouldn't be using a "root" or "admin" account to perform simple searches. 5. Keep Software Updated $stmt = $pdo->prepare('SELECT * FROM users WHERE id