Error

PHP Noticeyii\base\ErrorException

Undefined variable: discount

$_GET = [
    'slug' => 'elba',
];

$_SERVER = [
    'USER' => 'www-root',
    'HOME' => '/var/www/www-root/data',
    'HTTP_CF_IPCOUNTRY' => 'US',
    'HTTP_CDN_LOOP' => 'cloudflare',
    'HTTP_CF_CONNECTING_IP' => '52.91.0.68',
    'HTTP_USER_AGENT' => 'claudebot',
    'HTTP_ACCEPT' => '*/*',
    'HTTP_CF_VISITOR' => '{"scheme":"https"}',
    'HTTP_X_FORWARDED_PROTO' => 'https',
    'HTTP_CF_RAY' => '86b68494ba4e084c-IAD',
    'HTTP_X_FORWARDED_FOR' => '52.91.0.68',
    'HTTP_ACCEPT_ENCODING' => 'gzip, br',
    'HTTP_CONNECTION' => 'Keep-Alive',
    'HTTP_HOST' => 'kuhni-belarusi.ru',
    'REDIRECT_URL' => '/index.php',
    'SCRIPT_FILENAME' => '/var/www/www-root/data/www/kuhni-belarusi.ru/index.php',
    'REDIRECT_STATUS' => '200',
    'SERVER_NAME' => 'kuhni-belarusi.ru',
    'SERVER_PORT' => '443',
    'SERVER_ADDR' => '82.202.167.201',
    'REMOTE_PORT' => '23110',
    'REMOTE_ADDR' => '172.70.39.120',
    'SERVER_SOFTWARE' => 'nginx/1.18.0',
    'GATEWAY_INTERFACE' => 'CGI/1.1',
    'HTTPS' => 'on',
    'REQUEST_SCHEME' => 'https',
    'SERVER_PROTOCOL' => 'HTTP/1.1',
    'DOCUMENT_ROOT' => '/var/www/www-root/data/www/kuhni-belarusi.ru',
    'DOCUMENT_URI' => '/index.php',
    'REQUEST_URI' => '/product/elba/',
    'SCRIPT_NAME' => '/index.php',
    'CONTENT_LENGTH' => '',
    'CONTENT_TYPE' => '',
    'REQUEST_METHOD' => 'GET',
    'QUERY_STRING' => '',
    'PHP_ADMIN_VALUE' => 'sendmail_path = /usr/sbin/sendmail -t -i -f [email protected]',
    'FCGI_ROLE' => 'RESPONDER',
    'PHP_SELF' => '/index.php',
    'REQUEST_TIME_FLOAT' => 1711617350.1801469,
    'REQUEST_TIME' => 1711617350,
];