$this

if($this->rights=="none"){
   $publicsfields=array("CabinetID","DataCenterID",'Location','LocationSortable','ZoneID');
   //$this as $prop=>$value 对象的属性可以向数组一样进行操作, 
   foreach($this as $prop=>$value){
      if(!in_array($prop,$publicfields)){
         $this->$prop=null;
      }
   }
}

foreach($cabinetList as $i => $cab){
   if($limit && ($cab->MapX1==$cab->MapX2 || $cab->MapY1==$cab->MapY2)){
//注销数组元素      
unset($cabinetList[$i]);
   }
}