What potential pitfalls should be considered when working with PHP scripts that handle user inputs and data storage?

One potential pitfall when working with PHP scripts that handle user inputs and data storage is the risk of SQL injection attacks if user inputs are not properly sanitized. To prevent this, always use prepared statements or parameterized queries when interacting with a database to ensure that user inputs are treated as data rather than executable SQL code. 

// Example of using prepared statements to prevent SQL injection

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

// Prepare a SQL statement with a placeholder for user input
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');

// Bind the user input to the placeholder
$stmt->bindParam(':username', $_POST['username']);

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

// Fetch the results
$results = $stmt->fetchAll();

Keywords

SQL injection cross-site scripting data validation prepared statements secure coding practices

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