get_site_id() public method

Get site ID
public get_site_id ( ) : integer
return integer Site ID
 /**
  * Get cell value for the domain column
  *
  * @param Mapping $mapping Current mapping item
  * @return string HTML for the cell
  */
 protected function column_domain($mapping)
 {
     $domain = esc_html($mapping->get_domain());
     if (substr($domain, 0, 4) === 'www.') {
         $domain = substr($domain, 4);
     }
     $args = array('action' => 'mercator-aliases', 'id' => $mapping->get_site_id(), 'mappings' => $mapping->get_id(), '_wpnonce' => wp_create_nonce('mercator-aliases-bulk-' . $this->_args['site_id']));
     if (!$mapping->is_active()) {
         $text = __('Activate', 'mercator');
         $action = 'activate';
     } else {
         $text = __('Deactivate', 'mercator');
         $action = 'deactivate';
     }
     $args['bulk_action'] = $action;
     $link = add_query_arg($args, network_admin_url('admin.php'));
     $delete_args = $args;
     $delete_args['bulk_action'] = 'delete';
     $delete_link = add_query_arg($delete_args, network_admin_url('admin.php'));
     $edit_link = add_query_arg(array('action' => 'mercator-edit', 'id' => $mapping->get_site_id(), 'mapping' => $mapping->get_id()), network_admin_url('admin.php'));
     $actions = array('edit' => sprintf('<a href="%s">%s</a>', esc_url($edit_link), esc_html__('Edit', 'mercator')), $action => sprintf('<a href="%s">%s</a>', esc_url($link), esc_html($text)), 'delete' => sprintf('<a href="%s" class="submitdelete">%s</a>', esc_url($delete_link), esc_html__('Delete', 'mercator')));
     $actions = apply_filters('mercator_alias_actions', $actions, $mapping);
     $action_html = $this->row_actions($actions, false);
     return '<strong>' . $domain . '</strong>' . $action_html;
 }