What are the potential pitfalls of using $_GET to pass values between PHP pages, and how can they be mitigated?

Using $_GET to pass values between PHP pages can expose your application to security vulnerabilities such as XSS attacks and data manipulation. To mitigate these risks, it is recommended to sanitize and validate the input data before using it in your application. 

// Sanitize and validate input data from $_GET before using it
$id = isset($_GET['id']) ? filter_var($_GET['id'], FILTER_SANITIZE_NUMBER_INT) : null;

if ($id === null) {
    // Handle invalid input
} else {
    // Use the sanitized and validated $id in your application
}

Keywords

$_GET security vulnerabilities data validation URL encoding SQL injection

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