What are the potential security risks of using a PHP-based login system for a website?

One potential security risk of using a PHP-based login system is the vulnerability to SQL injection attacks if the input data is not properly sanitized. To mitigate this risk, developers should use prepared statements or parameterized queries to prevent malicious SQL injection attempts. 

// Using prepared statements 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 cross-site scripting session hijacking password hashing secure coding practices

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