ممكن شرح تحويل هذا الكود الي الاصدار php7

ممكن شرح تحويل هذا الكود الي الاصدار php7

class current_page{
var $protocol;
var $site;
var $thisfile;
var $real_directories;
var $num_of_real_directories;
var $virtual_directories = array();
var $num_of_virtual_directories = array();
var $baseurl;
var $thisurl;

function current_page(){
$this->protocol = $_SERVER['HTTPS'] == 'on' ? 'https' : 'http';
$this->site = $this->protocol . '://' . $_SERVER['HTTP_HOST'];
$this->thisfile = basename($_SERVER['SCRIPT_FILENAME']);
$this->real_directories = $this->cleanUp(explode("/", str_replace($this->thisfile, "", $_SERVER['PHP_SELF'])));
$this->num_of_real_directories = count($this->real_directories);
$this->virtual_directories = array_diff($this->cleanUp(explode("/", str_replace($this->thisfile, "", $_SERVER['REQUEST_URI']))),$this->real_directories);
$this->num_of_virtual_directories = count($this->virtual_directories);
$this->baseurl = $this->site . "/" . implode("/", $this->real_directories) . "/";
$this->thisurl = $this->baseurl . implode("/", $this->virtual_directories) . "";
}

function cleanUp($array){
$cleaned_array = array();
foreach($array as $key => $value){
$qpos = strpos($value, "?");
if($qpos !== false){ break; }
if($key != "" && $value != ""){ $cleaned_array[] = $value; }
}
return $cleaned_array;
}
}
$current_page = new current_page();
?>