Convert Time From The Base !

i have this function who get dattime from the sql base




foreach($events as $event)

                {

                        $items[]=array(

                                'title'=>$event['title'],

                                'start'=>$event['start_day'],

                                'end'=>$event['end_day'],                               

                                'allDay'=>$event['all_day'] == 1 ? true : false,

                                'editable'=>true,

                                'color'=>$event['background_color'] == '' ? '' : $event['background_color'],

                        );

               

                }



i whant to convert the time like this

‘start’=>strtotime(‘2014-03-11 09:00’) = 1394614800

So why can’t you do that?