Newbie to php

1.7.14

event_manager plugin

I need to change what details of an event are displayed in the widget provided by this plugin. In event_manager\views\widgets\events\view.php I have this code which I suspect dictates what is displayed...

$event_options["limit"] = $vars['entity']->num_display;

$events = event_manager_search_events($event_options);

$content = elgg_view_entity_list($events['entities'], 0, 0, 5, false);

set_context($current_context);

echo $content; 

Can anyone inform me what each line does?