What are best practices for handling form submissions and database interactions in PHP?

When handling form submissions in PHP, it is important to validate user input to prevent SQL injection and other security vulnerabilities. Additionally, using prepared statements can help protect against SQL injection attacks when interacting with a database. Lastly, always sanitize user input before storing it in the database to ensure data integrity. 

// Example of handling form submission and interacting with a database in PHP

// Validate and sanitize user input
$name = filter_var($_POST['name'], FILTER_SANITIZE_STRING);
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);

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

// Prepare a SQL statement to insert data into the database
$stmt = $pdo->prepare('INSERT INTO users (name, email) VALUES (:name, :email)');
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);

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

Keywords

SQL injection prepared statements PDO form validation error handling

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