php get_object_vars in abstract class

Question

This is my user class:

<?
require_once(dirname(__FILE__).'/DB.class.php');
require_once(dirname(__FILE__).'/Model.class.php');
class Benutzer extends Model
{
 private $id;
 private $loginName;
 private $loginPassword;
 private $eMail;
 private $rights;
 private $mailchange;
 private $name;
 private $vorname;
 private $matrikelnr;
 private $gruppe;
 /**
 * @TODO PhpDoc
 */
 protected function __construct($id = null)
 {
 if ($id !== null)
 $this->load($id);
 }
 /**
 * @TODO PhpDoc
 */
 public static function factory($id = null)
 {
 if ($id !== null && is_integer($id)){
 return new Benutzer($id);
 } else {
 return new Benutzer();
 }
 }
//getter and setter...
}

This is the abstract class that is inherited by the user class:

<?php
require_once(dirname(__FILE__).'/RowDataGateway.interface.php');
abstract class Model implements RowDataGateway
{
 public function getParameters()
 {
 return get_object_vars($this);
 }
 /**
 * @TODO PhpDoc
 */
 public function setParameters(array $values, $override = true)
 {
 foreach ($values as $key => $val) {
 if ($override){
 if (property_exists(get_class($this), $key))
 $this->$key = $val;
 }
 else {
 if (property_exists(get_class($this), $key) && !isset($this->key))
 $this->$key = $val;
 }
 }
 }
 /**
 * @TODO PhpDoc
 */
 public function load($id, $override = true)
 {
 $res = QueryBuilder::selectQuery($this);
 $result = DB::getInstance()->query($res['query'], array('id' => $id));
 $this->setParameters($result, $override);
 return $this;
 }
 /**
 * @TODO PhpDoc
 */
 public function save()
 {
 if (isset($this->id)){
 $res = QueryBuilder::updateQuery($this);
 if (DB::getInstance()->update($res['query'], $res['params'])){
 return $this;
 }
 }
 else {
 $res = QueryBuilder::insertQuery($this);
 if ($id = DB::getInstance()->insert($res['query'], $res['params'])){
 $this->id = $id;
 return $this;
 }
 }
 return false;
 }
 /**
 * @TODO Implement
 */
 public
 function delete()
 {
 }
}

Everytime i call the $obj->getParameters() function i get an empty array (in the foreach):

 public static function insertQuery(Model $obj)
 {
 //INSER INTO classname (field1,field2,field3) VALUES (val1,val2,val3)
 $vars = null;
 $query = 'INSERT INTO `'.strtolower(get_class($obj)).'` (';
 foreach ($obj->getParameters() as $key => $val) {
 if ($key !== 'id')
 $query .= $key.',';
 }
 $query = substr($query, 0, strlen($query) - 1);
 $query .= ') VALUES (';
 foreach ($obj->getParameters() as $key => $val) {
 if ($key !== 'id'){
 $query .= ':'.$key.',';
 $vars[':'.$key] = $val;
 }
 }
 $query = substr($query, 0, strlen($query) - 1);
 $query .= ')';
 return array('query' => $query, 'params' => $vars);
 }

I've already debugged the code and the right object is given to the function!?

Where is my mistake?

FMK

Answer 1

That's because the properties of the child class are not visible from the method. You have two options:

• Move the method to the child class.
• Turn the visibility of the properties from private into protected.

• FMK: Thanks, that exactly was the mistake!

Answer 2

From PHP 5.3.0, you can also use the ReflectionClass.

$reflect = new \ReflectionClass(get_class($this));
$props = [];
foreach ($reflect->getProperties() as /* @var $prop \ReflectionProperty */ $prop) {
 $prop->setAccessible(true);
 $props[$prop->name] = $prop->getValue($this);
 $prop->setAccessible(false);
}