What are potential pitfalls when using PHP to handle form submissions and database interactions?

One potential pitfall when using PHP to handle form submissions and database interactions is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To prevent this, always use prepared statements when interacting with your database to ensure that user input is properly escaped. 

// Example of using prepared statements to handle database interactions safely

// Establish database connection
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare SQL statement with placeholders
$stmt = $pdo->prepare('INSERT INTO users (username, email) VALUES (:username, :email)');

// Bind parameters to placeholders
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':email', $_POST['email']);

// Execute the statement
$stmt->execute();

Keywords

SQL injection data validation prepared statements CSRF protection error handling

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