PHP Sessions Problem :(

Hello people,

If I want to access to my admin back-end, you will get a form to input your name and password.

I have created a class that sets my session in a file called

StartSession.class.php

here it is:

<?php
class StartSession{
	static $admin_s;
	static $password_s;
	function __consrtuct($admin_session,$password_session){
		session_start();
		$_SESSION['admin']=$admin_session;
		$_SESSION['password']=$password_session;
		self::$admin_s=$admin_session;
		self::$password_s=$password_session;
	}
	
}
?>

In my admin file that I named

admin.php

I called to my StartSession() class like this:

$startsession=new StartSession($adminad,$passwordad);

Then I cread an awelcome.php file in my admin folder, which calls to a class that checks if my session is set, if not it redirects you to input your form, like this:

<?php
require_once('StartSession.class.php');
class SessionCheck{
	function __construc(){
		if(!isset(StartSession::$admin_s)||!isset(StartSession::$password_s)){
			header('Location:admin/index.php');
			exit();
		}
	}
	
}
?>

In my

awelcome.php

file, I called this class like this:

<?php
require_once('../Classes/SessionCheck.class.php');
$sessioncheck=new SessionCheck();
require_once('Includes/aheader.inc.php');
require_once('Includes/alMenu.inc.php');
?>
<div id="centered_content">
present
</div>
<?php
require_once('Includes/afooter.inc.php');
?>

Everything seems to work well, but then, when I taped the url to my

awelcome.php

file it did not redirect to my form input :( which thing means my session are not set as it is supposed to be : any one can help, please ?