What are the potential issues with using $_SERVER['REQUEST_URI'] to handle URL parameters in PHP?

Using $_SERVER['REQUEST_URI'] directly to handle URL parameters can pose security risks as it exposes the raw URL input from users, making it vulnerable to attacks like SQL injection or cross-site scripting. To mitigate this, it is recommended to sanitize and validate the input before processing it in your PHP code. 

// Sanitize and validate the URL parameter before using it
$urlParam = filter_input(INPUT_GET, 'urlParam', FILTER_SANITIZE_STRING);
if ($urlParam) {
    // Use the sanitized and validated URL parameter in your code
    echo "URL parameter: " . $urlParam;
} else {
    // Handle invalid or missing URL parameter
    echo "Invalid URL parameter";
}

Keywords

$_SERVER['REQUEST_URI'] URL parameters security vulnerability SQL injection data validation

Related Questions