In the provided PHP code, what potential pitfalls or security risks related to SQL injection should be considered?

SQL injection is a common security vulnerability where an attacker can manipulate SQL queries by inputting malicious code. To prevent SQL injection, it is crucial to use prepared statements or parameterized queries to sanitize and validate user input before executing SQL queries. 

// Using prepared statements to prevent SQL injection
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

$username = $_POST['username'];
$password = $_POST['password'];

$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username AND password = :password');
$stmt->bindParam(':username', $username);
$stmt->bindParam(':password', $password);
$stmt->execute();

// Rest of the code to handle the query results

Keywords

SQL injection PHP code security risks potential pitfalls error types

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