Parsing json data to objects in php - php

Question

The url to JSON structure
http://api.giphy.com/v1/gifs/search?q=funny+cat&offset=100&limit=1&api_key=dc6zaTOxFJmzC
Now I'm trying to parse this Json data to my objects:
this is my class:
<?php
class MappedEntity{
private $id;
private $mp4Url;
public function setId($id){
$this->id=$id;
}
public function setMp4Url($mp4Url){
$this->mp4Url=$mp4Url;
}
public function getId(){
return $id;
}
public function getMp4Url(){
return $mp4Url;
}
function __contruct($jsonData){
foreach($jsonData as $key => $val){
if(property_exists(__CLASS__,$key)){
$this->$key = $val;
}
}
}
}
?>
the code thats calling the class:
<?php
require_once 'mappedEntity.php';
$keyword = $_POST["keyword"];
$url="http://api.giphy.com/v1/gifs/search?q=".$keyword."&offset=100&limit=1&api_key=dc6zaTOxFJmzC";
$json = file_get_contents($url);
$file = json_decode($json);
$entity = new MappedEntity($file);
echo $entity->getId();
?>
Im getting
Notice:
Undefined variable: id in C:...\MappedEntity.php on line 14
which is following ine
13 public function getId(){
14 return $id;
15 }
OK, I changed the getter methods, and constructor , now the error goes
Notice: Undefined variable: id in C:\....\MappedEntity.php on line 14
Fatal error: Cannot access empty property in C:...\MappedEntity.php on line 14
I assume , my mapping method inside of constructor is not working fine?

Answer 1

You're missing the $this on both getID and getMp4URL functions, they should read:
public function getId(){
return $this->id;
}
and
public function getMp4Url(){
return $this->mp4Url;
}