What are the potential pitfalls of using $_GET to pass data between pages in PHP applications?

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

// Sanitize and validate the data received via $_GET
$id = isset($_GET['id']) ? filter_var($_GET['id'], FILTER_SANITIZE_NUMBER_INT) : null;

// Use the sanitized data in your application
if ($id !== null) {
    // Perform actions with the sanitized $id
}

Keywords

$_GET data passing security vulnerabilities injection attacks validation.

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