laravel trying to get property of non object - php

Question

I'm having an error in laravel 4.2
"Trying to get property of non object"
It was working good before and so I don't know why it's not working now.
This is my code:
Controller:
public function id($lang,$id,$vers) {
// $Agent = new Agent();
// if ($Agent->isMobile()) {
// $data['settings'] = Courses::settings($id, $vers);
// $this->layout->content = View::make('gui.mobile')->with('data', $data);
// } else {
$data['index'] = Courses::productsIndex($id);
$data['langs'] = Courses::langsclient($id);
$data['settings'] = Courses::settings($id, $vers);
$this->layout->content = View::make('gui.home')->with('data', $data);
// }
}
model:
public static function productsIndex($id,$html='') {
$clients = DB::table('clients')->where('client_id',$id)->first();
$clients_settings = DB::table('clients_settings')->where('clients_id',$id)->first();
$courss = explode(',', $clients->products);
$IndexCats = '';
$IndexCats .= '' . trans('home.All Products') .'';
foreach($courss as $index) {
$IndexCats .= '' . trans('home.' . $index) . '';
}
$clients = DB::table('clients')->where('client_id',$id)->first();
$cours = explode(',', $clients->coruses);
$tabs ='';
$links='';
foreach($cours as $row) {
$idcours = DB::table('courses')->where('id',$row)->get();
$coursCount = DB::table('lessons')->where('courses_id',$row)->count();
$clients_settings = DB::table('clients_settings')->where('clients_id',$id)->first();
$clients_images_ebook = DB::table('mediameneger')->where('name','ebook')->where('type','image')->where('client_id',$id)->first();
if($row == 'ebook') {
$image_ebook = !empty($clients_images_ebook->fullpath) ? $clients_images_ebook->fullpath : url() .'/files/images/ebook.jpg';
$tabs .= '<li class="videos ebook" style="background-image: url(' . $image_ebook . '?86400' .');">';
$tabs .= '<p><a href="'. url() .'/gui/' . Request::segment(2) . '/'. $id .'/' . Request::segment(4) . '/ebooks">Ebook';
$tabs .= '<span class="more"><br />';
$tabs .= '<i class="hidden-xs cercale glyphicon glyphicon-book fa-3x"></i></span>';
$tabs .= '</a></p>';
$tabs .= '</li>';
}
if($row == 'ebook_forex') {
$image_ebook = !empty($clients_images_ebook->fullpath) ? $clients_images_ebook->fullpath : url() .'/files/images/ebook.jpg';
$tabs .= '<li class="videos ebook" style="background-image: url(' . $image_ebook . '?86400'.');">';
$tabs .= '<p><a href="'. url() .'/gui/' . Request::segment(2) . '/'. $id .'/' . Request::segment(4) . '/ebooks_forex">Ebook Forex';
$tabs .= '<span class="more"><br />';
$tabs .= '<i class="hidden-xs cercale glyphicon glyphicon-book fa-3x"></i></span>';
$tabs .= '</a></p>';
$tabs .= '</li>';
}
if($row == 'chats') {
$image_ebook = !empty($clients_images_ebook->fullpath) ? $clients_images_ebook->fullpath : url() .'/files/images/chat.jpg';
$tabs .= '<li class="videos chats" style="background-image: url(' . $image_ebook . '?86400'.');">';
$tabs .= '<p><a href="'. url() .'/gui/' . Request::segment(2) . '/'. $id .'/' . Request::segment(4) . '/chats">Chat with an expert';
$tabs .= '<span class="more"><br />';
$tabs .= '<i class="hidden-xs cercale fa fa-weixin fa-3x"></i></span>';
$tabs .= '</a></p>';
$tabs .= '</li>';
}
foreach($idcours as $row2) {
$lang = !empty(Session::get('local')) ? Session::get('local') : 'gb';
$showbox = DB::table('mediameneger')->where('course',$row2->id)->where('lang', $lang)->limit(1)->get();
$clients_images = DB::table('mediameneger')->where('course',$row2->id)->where('type','image')->where('client_id',$id)->first();
foreach ($showbox as $key) {
$lang = Session::get('local') != null ? Session::get('local') : Request::segment(2);
$image = !empty($clients_images->fullpath) ? $clients_images->fullpath : $row2->imagepath;
$tabs .= '<li class="videos" style="background-image: url('. $image . '?86400' .');">';
$tabs .= '<p><a href="'. url() .'/gui/' . $lang . '/' . $id .'/' . Request::segment(4) . '/lessons/' . $row2->id . '">' . trans('home.'. $row2->name . '') . '';
$tabs .= '<span class="more"><i class="text">' . $coursCount . ' ' . trans('home.lessonstotal') .'</i><br />';
$tabs .= '<i class="hidden-xs cercale glyphicon glyphicon-play fa-3x"></i></span>';
$tabs .= '</a></p>';
$tabs .= '</li>';
}
}
}
$tabs .='<li style="overflow: hidden; clear: both; height: 0; position: relative; float: none; display: block;"></li>';
$data['tabs'] = $tabs;
$data['IndexCats'] = $IndexCats;
return $data;
}
The errors is from all the explode();
and I don't know why is working before.

Answer 1

Try to run command "php artisan dump-autoload" and composer "dump-autoload".

Answer 2

Log out of your website and then log back in. This usually happens when you leave the local development server alone for a bit.