case 'today':
   $arr['timeFrom'] = date('Y-m-d H:i:s',mktime(0,0,0,date("m"),date("d"),date("Y")));
   $arr['timeTo']   = date('Y-m-d H:i:s',mktime(23,59,59,date("m"),date("d"),date("Y"))); 
   break;
case 'yesterday':
   $arr['timeFrom'] = date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d")-1,date("Y")));
   $arr['timeTo']   = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-1,date("Y")));
   break;
case 'thisWeek':
   $arr['timeFrom'] = date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d")-date("w")+1,date("Y")));
   $arr['timeTo']   = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7,date("Y")));
   break;
case 'lastWeek':
   $arr['timeFrom'] = date("Y-m-d H:i:s",mktime(0,0,0,date("m"),date("d")-date("w")+1-7,date("Y")));
   $arr['timeTo']   = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("d")-date("w")+7-7,date("Y")));
   break;
case 'thisMonth':
   $arr['timeFrom'] = date("Y-m-d H:i:s",mktime(0,0,0,date("m"),1,date("Y")));
   $arr['timeTo']   = date("Y-m-d H:i:s",mktime(23,59,59,date("m"),date("t"),date("Y")));
   break;
case 'lastMonth':
   $arr['timeFrom'] = date("Y-m-d H:i:s",mktime(0,0,0,date("m")-1,1,date("Y")));
   $arr['timeTo']   = date("Y-m-d H:i:s",mktime(23,59,59,date("m") ,0,date("Y")));
   break;
case 'thisYear':
   $arr['timeFrom'] = date('Y-m-d H:i:s', mktime(0,0,0,1,1,date('Y')));
   $arr['timeTo']   = date('Y-m-d H:i:s', mktime(23,59,59,12,31,date('Y')));
   break;
case 'lastYear':
   $arr['timeFrom'] = date('Y-m-d H:i:s', mktime(0,0,0,1,1,date('Y')-1));
   $arr['timeTo']   = date('Y-m-d H:i:s', mktime(23,59,59,12,31,date('Y')-1));    
   break;