what does this structure in PHP mean "$variable[$variable2]"?

[dmirsch]

What does the square bracketed variable mean in the line of code below?

 
function draw_calendar($month,$year,$events = array()){

// coding removed here...

      $event_day = $year.'-'.$month.'-'.$list_day;
      if(isset($events[$event_day])) {
        foreach($events[$event_day] as $event) {
          $calendar.= '<div class="event">'.$event['EventTitle'].'</div>';
		//^this is where we put the performance info
        }
      } else {
        $calendar.= str_repeat('<p> </p>',2);
		//^this is where we have blanks if an event_day <> list_day
      }

[dougjohnson]

I think that's an array.  arrayname[index]

[dmirsch]

So is it then that the variable $events is the array and $event_day is the specific row of that array?

[Zane]

So is it then that the variable $events is the array and $event_day is the specific row of that array?

Indeed.