How can PHP developers ensure data integrity and prevent manipulation when passing data in URLs?

To ensure data integrity and prevent manipulation when passing data in URLs, PHP developers can use techniques such as data validation, sanitization, and encryption. Data validation ensures that only expected and valid data is passed through URLs, while sanitization helps to clean and filter input data. Encryption can be used to secure sensitive data before passing it in URLs. 

// Example of validating and sanitizing data before passing it in a URL
$user_id = $_GET['user_id']; // Retrieve user_id from URL parameter
if (!is_numeric($user_id)) {
    // Invalid user_id, handle error or redirect
    die("Invalid user ID");
}

// Sanitize the user_id to prevent SQL injection
$sanitized_user_id = filter_var($user_id, FILTER_SANITIZE_NUMBER_INT);

// Now use the sanitized user_id in your application logic

Keywords

data integrity data manipulation URL parameters encryption validation

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