tl_member::toggleVisibility PHP Method

    public function toggleVisibility($intId, $blnVisible, DataContainer $dc = null)
    {
        // Set the ID and action
        Input::setGet('id', $intId);
        Input::setGet('act', 'toggle');
        if ($dc) {
            $dc->id = $intId;
            // see #8043
        }
        // Check the field access
        if (!$this->User->hasAccess('tl_member::disable', 'alexf')) {
            throw new Contao\CoreBundle\Exception\AccessDeniedException('Not enough permissions to activate/deactivate member ID ' . $intId . '.');
        }
        $objVersions = new Versions('tl_member', $intId);
        $objVersions->initialize();
        // Reverse the logic (members have disabled=1)
        $blnVisible = !$blnVisible;
        // Trigger the save_callback
        if (is_array($GLOBALS['TL_DCA']['tl_member']['fields']['disable']['save_callback'])) {
            foreach ($GLOBALS['TL_DCA']['tl_member']['fields']['disable']['save_callback'] as $callback) {
                if (is_array($callback)) {
                    $this->import($callback[0]);
                    $blnVisible = $this->{$callback[0]}->{$callback[1]}($blnVisible, $dc ?: $this);
                } elseif (is_callable($callback)) {
                    $blnVisible = $callback($blnVisible, $dc ?: $this);
                }
            }
        }
        $time = time();
        // Update the database
        $this->Database->prepare("UPDATE tl_member SET tstamp={$time}, disable='" . ($blnVisible ? '1' : '') . "' WHERE id=?")->execute($intId);
        $objVersions->create();
        // Remove the session if the user is disabled (see #5353)
        if (!$blnVisible) {
            $this->Database->prepare("DELETE FROM tl_session WHERE name='FE_USER_AUTH' AND pid=?")->execute($intId);
        }
    }