A non-numeric value encountered Laravel 5 - laravel

Question

It's been a while since I'm getting the same Error after I installed the Laravel Voyager package, when I wanted to access the /admin it shows this error as mentioned in the picture.
I didn't get where the problem come from..
Please help
A non-numeric value encountered
Here is my code :
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use DB;
use Auth;
class HomeController extends Controller
{
/**
* Create a new controller instance.
*
* #return void
*/
/**
* Show the application dashboard.
*
* #return \Illuminate\Http\Response
*/
public function index($page = 1)
{
$DBpostscheck= DB::table('posts')->where('whocanseethis', 'Everyone')->select('id')->get();
$postcount = 0;
$pageminus = $page - 1;
$toskip = $pageminus * 20;
foreach($DBpostscheck as $post) {
$postcount++;
}
$pagecount = ceil($postcount / 20);
if($page > 1) {
$previouspage = $page - 1;
} else {
$previouspage = false;
}
$nextpage = $page + 1;
$DBposts = DB::table('posts')->where('whocanseethis', 'Everyone')->take(20)->skip($toskip)->get();
$DBcategories = DB::table('categories')->get();
//need for poll
$allvotes = 0;
$DBpoll = DB::table('poll')->get();
$DBvotes = DB::table('pollvotes')->select('id')->get();
foreach ($DBvotes as $vote) {
$allvotes++;
}
//end
if(isset(Auth::user()->name)) {
$loggedid = Auth::user()->id;
$DBrepliesthreads = DB::table('replies')->where('authorid', $loggedid)->get();
array_set($array, 'arraycreator45236125312', 69);
foreach ($DBrepliesthreads as $replythreads) {
array_push($array, $replythreads->postid);
}
array_forget($array, 'arraycreator45236125312');
$DBactivethreads = DB::table('posts')->where('authorid', $loggedid)->orWhereIn('id', $array)->orderBy('updated_at', 'desc')->select('title', 'id')->groupBy('title')->take(6)->get();
return view('home', ['DBposts' => $DBposts, 'page' => $page, 'pagecount' => $pagecount,'nextpage' => $nextpage, 'previouspage' => $previouspage,
'DBcategories' => $DBcategories, 'DBactivethreads' => $DBactivethreads, 'DBpoll' => $DBpoll,'allvotes' => $allvotes]);
}
return view('home', ['DBposts' => $DBposts, 'page' => $page, 'pagecount' => $pagecount,'nextpage' => $nextpage, 'previouspage' => $previouspage,
'DBcategories' => $DBcategories, 'DBpoll' => $DBpoll, 'allvotes' => $allvotes]);
}
}