Create Restricted Content for Specific User/s

Hi. what if I do something like this is the backend

<?php
$enc_user = wp_get_current_user();
$user_role = json_encode($enc_user->roles);
echo gettype($user_role);
echo $user_role;

if ($user_role == ‘[“subscriber”]’ || $user_role == null){
echo “saadsa”;
[[ultimatemember form_id=”79″]] /* what syntax should I place here so it will actually display on my frontend? */
} else {
echo “saaaa”;
}
?>

thank you so much for your response.