What are some best practices to ensure smooth form data handling in PHP scripts?

Issue: To ensure smooth form data handling in PHP scripts, it is important to properly sanitize and validate user input to prevent security vulnerabilities and data inconsistencies. PHP Code Snippet: 

// Sanitize and validate form data
$name = isset($_POST['name']) ? htmlspecialchars($_POST['name']) : '';
$email = isset($_POST['email']) ? filter_var($_POST['email'], FILTER_SANITIZE_EMAIL) : '';
$message = isset($_POST['message']) ? htmlspecialchars($_POST['message']) : '';

// Validate email format
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Invalid email format";
    exit;
}

// Process the form data
// (Insert code here to handle the form data, such as storing it in a database or sending an email)

Keywords

validation sanitization error handling security measures form submission

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