How to get everything outside the database with foreach and class - php

Question

I have a problem. I want some data out my database.
I have two page's a categorie.php here I want that he shows everything out the database. And I have a second page. Here are my classes. I have trying a foreach on the categorie.php but if I do that, than shows he 1 thing out the database 4 times the same and not the another data.
Below you can see my code.
I hope that you can help me.
Thank you.
This is my categorie.php
<?php
require_once '../app/functions/second.php';
require_once '../app/db/dbpassword.php';
require_once 'include/head.php';
if (isset($_GET['categorie']) && !empty($_GET['categorie'])) {
$id = $_GET['categorie'];
$dbh = new PDO("mysql:host=$host; dbname=$dbname;", $usernamedb,
$passworddb);
$cate = new Categorie($dbh);
$cate->loadCate($id);
// $page->loadId($id);
$categorie = $cate->getCategorie();
$titel = ucwords($categorie);
?>
<h2 class="center_h2"><?= $titel ?></h2>
<?php foreach ($cate as $key) {
$titelart = $cate->getTitel();
$beschrijving = $cate->getBeschrijving();
$plaatje = $cate->getImage();
$id = $cate->getId();
var_dump($titelart);
} ?>
<?php
} else {
echo "Dit bericht is verwijderd of is verplaats.";
}
require_once 'include/footer.php';
?>
This is my class page
<?php
class Categorie {
protected $dbh;
public function __construct($new_dbh){
$this->dbh = $new_dbh;
}
public function loadCate($cate){
$query = $this->dbh->prepare('SELECT * FROM schilderijen WHERE categorie=?');
$query->execute(array($cate));
while ($row = $query->fetch(PDO::FETCH_OBJ)) {
$this->id = $row->id;
$this->categorie = $row->categorie;
$this->titel = $row->titel;
$this->beschrijving = $row->beschrijving;
$this->plaatje = $row->plaatje;
}
}
public function getId(){
return $this->id;
}
public function getCategorie(){
return $this->categorie;
}
public function getTitel(){
return $this->titel;
}
public function getBeschrijving(){
return $this->beschrijving;
}
public function getImage(){
return $this->plaatje;
}
}
?>

Answer 1

Ok so you have a problem with the use of your class. In the while after your SQL request, you apply the value the instance variable like $this->id = $row->id; but this variable will be rewrite with the next row value.
Use a static function for your SQL request and return an array of Categorie like that :
class Categorie {
protected $id, $categorie, $title, $beschrijving, $plaatje;
public function __construct($id, $categorie, $title, $beschrijving, $plaatje){
$this->id = $id;
$this->categorie = $categorie;
$this->title = $title;
$this->beschrijving = $beschrijving;
$this->plaatje = $plaatje;
}
public static function loadCate($dbh, $cate){
$query = $dbh->prepare('SELECT * FROM schilderijen WHERE categorie=?');
$query->execute(array($cate));
$res = array();
while ($row = $query->fetch(PDO::FETCH_OBJ)) {
$res[] = new Categorie($row->id, $row->categorie, $row->titel, $row->beschrijving, $row->plaatje);
}
return $res;
}
public function getId(){
return $this->id;
}
public function getCategorie(){
return $this->categorie;
}
public function getTitle(){
return $this->title;
}
public function getBeschrijving(){
return $this->beschrijving;
}
public function getImage(){
return $this->plaatje;
}
}
And you can use it like that:
$categories = Categorie::loadCate($dbh, $id);
foreach($categories as $categorie){
var_dump($categorie->getTitle());
}