$session variable problem

[MarcinP]

Hi guys.

I have very strange problem that i cant managed fo few hours. This is realy hard to understand for me.

I work on website and i want it to have banners in few places. In admin i created structure: Banners > Banner Group > Banner 1, Banner2, Banner 3 etc. I want this banners to be loaded one by one rather than randomly. I created function that print baner and save its id to session variable like this:

function renderBannerBox($banner_group = false) { //takes banner group name as argument
	$out = '';			
	if ($banner_group) {
		$bgroup_url = '/banners/' . $banner_group . '/';
		$bgroup = wire(pages)->get($bgroup_url);
		
		if ($bgroup->id) {		
			$bgroup_id = $bgroup->id;
			
			//for every banner group create separate session variable to store displayed banners
			$session_name =  $bgroup->name . '_array'; 
			
			//get session variable with array of ids of displayed banners
			$displayed_banners = wire(session)->$session_name; 
			
			$selector = "id!=";
			$selector .= substr($displayed_banners, 0, -1);
			$selector .= ", template=banner, parent=$bgroup_id";
			
			$banners = wire(pages)->find("template=banner, parent=$bgroup_id");
			
			$banner = $banners->get($selector);
	
			//if no banner (first view or all banners from group displayed) get random banner and
			if (! $banner->id) { 
				$displayed_banners = ''; // clear $displayed banners variable
				$banner = $banners->findRandom(1)->first; //get random banner			
			}
	
			//add current banner id to variable
			$displayed_banners .= $banner->id . '|';
			
			// save variable to $session
			wire(session)->$session_name = $displayed_banners;	
			
			
			// code for html formating	
		}
}	
	

Strange thing is that for every page refresh different number of banners ids are saved to my $session variable. One time is 1 id, second time 2 ids and so on.

You can see it here: http://demo.webego.pl/ginfo/ - above every banner i print current value of $session variable.

I tested it also in my main template file with independent test variable - it works the same way. It looks like page is sometimes 'double loaded'.

Please let me know if you have any idea what is going on.

[Nico Knoll]

(Maybe not related to your problem - but why don't you use $a->getNext() ?)