What are some common pitfalls to avoid when writing registration scripts in PHP?

One common pitfall to avoid when writing registration scripts in PHP is not properly sanitizing user input, which can leave the application vulnerable to SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries when interacting with a database to prevent malicious code injection. 

// Example of using prepared statements to insert user registration data into a database

$stmt = $pdo->prepare("INSERT INTO users (username, email, password) VALUES (:username, :email, :password)");
$stmt->bindParam(':username', $username);
$stmt->bindParam(':email', $email);
$stmt->bindParam(':password', $hashedPassword);

$stmt->execute();

Keywords

SQL injection form validation password hashing CSRF protection error handling

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