What are some common pitfalls to avoid when creating a signature generator in PHP?

One common pitfall to avoid when creating a signature generator in PHP is not properly sanitizing user input, which can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To prevent this, always use prepared statements or input validation functions to sanitize user input before using it in your code. 

// Sanitize user input using prepared statements
$user_input = $_POST['user_input'];
$stmt = $pdo->prepare("INSERT INTO signatures (user_input) VALUES (:user_input)");
$stmt->bindParam(':user_input', $user_input);
$stmt->execute();

Keywords

security input validation cryptographic functions file handling error handling

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