I am a beginner level php programmer. I was trying to use the MVC but I can't even get past the testing of this one.

Problem: Warning: Invalid argument supplied for foreach() in httpdocs/data/serieDAO.php on line 15

Can anyone give me a tip to what is causing this problem?

The code (sorry if it is very long):

/index.php

```
<?php 
ini_set('display_errors', 1);
// main controller
require_once ("business/serieservice.php");
$service = new SerieService();
$serielijst = $service->toonAlleSeries();
include("test/test1.php");
?>

```

/business/serieservice.php

```
<?php
require_once("data/serieDAO.php");
class SerieService{

    public function toonAlleSeries(){
        $serieDAO = new SerieDAO();
        $lijst = $serieDAO->displayList();
        return $lijst;
    }
}
?>

```

/data/serieDAO.php

```
 <?php
require_once("entities/series.class.php");

class SerieDAO{

    // public function __construct(){
        // $dbh = new PDO("mysql:host=localhost;dbname=tvseasons", "seasons", "bompa");
    // }

    public function displayList(){
        $list = array();
        $dbh = new PDO("mysql:host=localhost;dbname=tvseasons", "seasons", "bompa");
        $sql = "select id, title, desc, url, genre, trailer from Series";
        $resultSet = $dbh->query($sql);
        foreach ($resultSet as $row){
            $serie = new Series($row["id"], $row["title"],$row["desc"], $row["url"], $row["genre"], $row["trailer"]);
            array_push($list, $serie);
        }
        $dbh = null;        
        return $list;
    }

}
?>

```

/entities/series.class.php

```
<?
//class met getters en setters van series entity
class Series{
  private $id;
  private $title;
  private $desc; //description
  private $url;
  private $genre;
  private $trailer;

  /* Try to figure out how to determine the $id. Cannot be set obviosly but get should be possible */

  //setters
  function setTitle ($title){
    $this->title = $title;
  }
  function setDesc($desc){
    $this->desc = $desc;
  }
  function setUrl($url){
    $this->url = $url;
  }
  function setGenre($genre){
    $this->genre = $genre;
  }
  function setTrailer($trailer){
    $this->trailer = $trailer;
  }

  //getters
  function getTitle(){
    return $this->title;
  }
  function getDesc(){
    return $this->desc;
  }
    function getUrl(){
    return $this->url;
  }
    function getGenre(){
    return $this->genre;
  }
    function getTrailer(){
    return $this->trailer;
  }
}
?>

```

/test/test1.php

```
<html>
<head>
<title>Test1 lijst series</title>
</head>
<body>
<h1>Een lijst van alle series</h1>
<ul>
<?php
foreach($serielijst as $serie){
 print ("<li>bla bla</li>");
}
?>
</ul>
</body>
</html>

```

edit: I know the code Inside the foreach is not working yet. But I already figured out that that is not the cause.