What are some potential pitfalls to avoid when working with arrays and database queries in PHP?

One potential pitfall to avoid when working with arrays and database queries in PHP is not properly sanitizing user input before using it in a query. This can leave your application vulnerable to SQL injection attacks. To prevent this, always use prepared statements or parameterized queries to securely pass user input to the database. 

// Example of using prepared statements to avoid SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();
$results = $stmt->fetchAll();

Keywords

SQL injection PDO prepared statements array functions data validation

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