How can a PHP developer ensure data security when working with databases?

To ensure data security when working with databases in PHP, developers should use parameterized queries or prepared statements to prevent SQL injection attacks. This approach helps sanitize user input and prevents malicious code from being executed on the database. Additionally, developers should validate and sanitize all user input to prevent cross-site scripting (XSS) attacks. 

// Using parameterized queries to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username AND password = :password");
$stmt->bindParam(':username', $username);
$stmt->bindParam(':password', $password);
$stmt->execute();

Keywords

SQL injection prepared statements encryption hashing data validation

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