In the context of the provided code, what are some common pitfalls to avoid when working with dynamic content and user interactions in PHP?

One common pitfall to avoid when working with dynamic content and user interactions in PHP is not properly sanitizing user input, which can leave your application vulnerable to security risks such as SQL injection attacks. To mitigate this risk, always use prepared statements or parameterized queries when interacting with a database to prevent malicious input from being executed as SQL commands. 

// Example of using prepared statements to sanitize user input when interacting with a database
$userInput = $_POST['user_input'];

$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $userInput, PDO::PARAM_STR);
$stmt->execute();

Keywords

SQL injection cross-site scripting input validation session management form submission data sanitization

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