e. What are the potential pitfalls or common mistakes when using ADODB in PHP?

One potential pitfall when using ADODB in PHP is not properly sanitizing user input, which can lead to SQL injection attacks. To prevent this, always use parameterized queries or prepared statements to securely interact with the database.

// Example of using parameterized queries with ADODB
$username = $_POST['username'];
$password = $_POST['password'];

$conn = ADONewConnection('mysql');
$conn->Connect('localhost', 'username', 'password', 'database');

$sql = "SELECT * FROM users WHERE username = ? AND password = ?";
$result = $conn->Execute($sql, array($username, $password));

if ($result) {
    // Process the query result
} else {
    // Handle errors
}