如何让我的班级从课堂外使用数组？

Question

I'm currently trying to get back into object oriented programming How do i get my array inside my class? Global doesn't seam to cut it.

<?
$systems = file_get_contents('https://api.eveonline.com/map/Sovereignty.xml.aspx');
$systems = explode("<row ",$systems);
//print_r($systems);
for ($i = 1; $i <= count($systems); $i++) {

    //system name
    $systemnames=explode("solarSystemName=",$systems[$i]);
    $systemnames=explode('"',$systemnames[1]);
    $systemnames=$systemnames[1];

    //system id
    $systemid=explode("solarSystemID=",$systems[$i]);
    $systemid=explode('"',$systemid[1]);
    $systemid=$systemid[1];

    $systembyid[$systemid]=$systemnames;
    $systembyname[$systemnames]=$systemid;
}   

class Systems{    

    public function __construct()
    {
        global $systembyid;
        global $systembyname;
    }

    function getSystems($system)
    {
        if (is_numeric($system) && $systembyid[$system]) {
            return $systembyid[$system];
        }
        elseif($systembyname[$system]){
            return $systembyname[$system];
        }
        else{
           return "Error: Invalid system id or name";
        }
    }
}

?>

Answer 1

Try passing the values into the constructor like this, also if you use the & you are just passing a reference and not making a copy of the whole array.

class Systems{    

    private $sysyembyid;
    private $systembyname;

    public function __construct(&$systembyid, &$systembyname)
    {
        $this->systembyid = $systembyid;
        $this->systembyname = $systembyname;
    }

    function getSystems($system){
        if(is_numeric($system) && $this->systembyid[$system]){
        return $this->systembyid[$system];
    }
    elseif($this->systembyname[$system]){
            return $this->systembyname[$system];
        }
        else{
           return "Error: Invalid system id or name";
        }
    }
}