What are the common mistakes to avoid when handling form submissions in PHP?

One common mistake to avoid when handling form submissions in PHP is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries to bind user input to database queries. 

// Example of using prepared statements to handle form submissions securely
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':email', $_POST['email']);
$stmt->execute();

Keywords

validation security SQL injection error handling form processing

Related Questions