Display user ID on the edit profile page

This example adds a read-only User ID brick that is available only for profile forms.

Add this code to site.php file:

Am_Di::getInstance()->hook->add(Am_Event::LOAD_BRICKS, function (Am_Event $event) {
    class Am_Form_Brick_UserId extends Am_Form_Brick
    {
        public function __construct($id = null, $config = null)
        {
            $this->name = ___('User ID (readonly)');
            parent::__construct($id, $config);
        }

        public function initConfigForm(Am_Form $form)
        {
            $form->addText('label')->setLabel(___('Label'));
        }

        public function insertBrick(HTML_QuickForm2_Container $form)
        {
            $data = array(
                'content' => Am_Di::getInstance()->auth->getUserId(),
                'label' => $this->getConfig('label', ___('User ID')),
            );
            $form->addStatic('user_id', null, $data);
        }

        public function isAcceptableForForm(Am_Form_Bricked $form)
        {
            return $form instanceof Am_Form_Profile;
        }
    }
});

Then edit the Profile form in aMember CP -> Forms Editor -> Edit Form and add the User ID (readonly) brick to the profile form.