public function disable_fields() {

        $mform    =& $this->_form;

        $mform->disabledIf('lti_registrationurl', null);
        $mform->disabledIf('lti_capabilities', null);
        $mform->disabledIf('lti_services', null);

    }
public function disable_fields() {

        $mform    =& $this->_form;

        $mform->disabledIf('lti_registrationurl', null);
        $mform->disabledIf('lti_capabilities', null);
        $mform->disabledIf('lti_services', null);

    }
public function disable_fields ( ) { $ mform = & $ this -> _form ; $ mform -> disabledIf ( 'lti_registrationurl' , null ) ; $ mform -> disabledIf ( 'lti_capabilities' , null ) ; $ mform -> disabledIf ( 'lti_services' , null ) ; }
Set up rules for disabling fields.
Set up rules for disabling fields .