Deling door nul probleem

application/controllers/Dashboard.php

@@ -35,12 +35,18 @@ class Dashboard extends CI_Controller
 		$vragen = $this->Dashboard_model->get_total_vragen();
 		$antwoorden = $this->Dashboard_model->get_total_gedaan();
 		
-		$data['gedaan'] = round(($antwoorden/$vragen)*100);
+		if ($vragen == 0) {
+			$data['gedaan'] = 0;
+		} else {
+			$data['gedaan'] = round(($antwoorden/$vragen)*100);
+		}
 		
 		// Per lijst
 		$subgroepen = $this->Dashboard_model->get_subgroepen();
 		$lijsten = $this->Dashboard_model->get_lijsten();
-		
+
+		$bardata = array();
+
 		foreach ($lijsten as $lijst)
 		{
 			$beantwoord = 0;
@@ -51,7 +57,11 @@ class Dashboard extends CI_Controller
 				$aantal = $this->Dashboard_model->get_antwoorden($vraag['id']);
 				$beantwoord = $beantwoord + $aantal;
 			}
-			$bardata[$lijst['id']]['percentage'] = (($beantwoord)/($subgroepen*count($vragen)))*100;
+			if (($subgroepen*count($vragen)) == 0) {
+				$bardata[$lijst['id']]['percentage'] = 0;
+			} else {
+				$bardata[$lijst['id']]['percentage'] = (($beantwoord)/($subgroepen*count($vragen)))*100;
+			}
 		}
 
 		$data['bardata'] = $bardata;
@@ -71,9 +81,15 @@ class Dashboard extends CI_Controller
 			}
 		}
 		
-		$data['bar']['gedaan'] = round(($barok/($barok + $barnok + $barbezig))*100);
-		$data['bar']['bezig'] = round(($barbezig/($barok + $barnok + $barbezig))*100);
-		$data['bar']['doen'] = 100-$data['bar']['gedaan']-$data['bar']['bezig'];
+		if (($barok + $barnok + $barbezig) == 0) {
+			$data['bar']['gedaan'] = 0;
+			$data['bar']['bezig'] = 0;
+			$data['bar']['doen'] = 100;
+		} else {
+			$data['bar']['gedaan'] = round(($barok/($barok + $barnok + $barbezig))*100);
+			$data['bar']['bezig'] = round(($barbezig/($barok + $barnok + $barbezig))*100);
+			$data['bar']['doen'] = 100-$data['bar']['gedaan']-$data['bar']['bezig'];
+		}
 
 		// Header
 		$this->load->view('header', $data);
@@ -143,4 +159,4 @@ class Dashboard extends CI_Controller
 		$this->load->view('footer');
 	}
 	
-}
+}