What are some 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 prevent this, always use prepared statements when interacting with your database to ensure that user input is properly escaped. 

// Example of using prepared statements to handle form submissions securely

// Assuming $conn is your database connection

$stmt = $conn->prepare("INSERT INTO users (username, email) VALUES (?, ?)");
$stmt->bind_param("ss", $username, $email);

$username = $_POST['username'];
$email = $_POST['email'];

$stmt->execute();

$stmt->close();
$conn->close();

Keywords

SQL injection form validation cross-site scripting CSRF protection error handling

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