What best practices should be followed when handling form data in PHP to prevent errors and ensure successful database inserts?

When handling form data in PHP, it is important to properly sanitize and validate user input to prevent errors and ensure successful database inserts. This can be done by using functions like htmlspecialchars() to prevent XSS attacks and filter_var() to validate input data. Additionally, using prepared statements with PDO or MySQLi will help prevent SQL injection attacks. 

// Sanitize and validate form data
$name = htmlspecialchars($_POST['name']);
$email = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);

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

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

// Bind the sanitized input data to the placeholders
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);

// Execute the statement to insert data into the database
$stmt->execute();

Keywords

validation sanitization prepared statements PDO error handling

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