new custom role if isset

function register_role_custom(){ ?>
    <?php
    if (isset($_GET['role'])){
        $customRole = $_GET['role'];
    }
    else{
        $customRole = $_POST['role'];
    }
    ?>
    <input id="role" type="hidden" tabindex="0" size="0" value= "<?php echo $customRole;?>" name="role"/>

<?php
}