What are the best practices for handling form data in PHP to ensure data integrity and security?

To ensure data integrity and security when handling form data in PHP, it is important to sanitize and validate user input to prevent SQL injection and cross-site scripting attacks. One way to achieve this is by using PHP's filter_input function to sanitize input data and validate it against specific criteria. 

// Sanitize and validate form data
$name = filter_input(INPUT_POST, 'name', FILTER_SANITIZE_STRING);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);

// Check if the input data is valid
if ($name && $email) {
    // Process the form data
    // Insert into database, send email, etc.
} else {
    // Handle invalid input
    echo "Invalid input data";
}

Keywords

SQL injection data validation prepared statements CSRF protection input sanitization

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