Undefined variable error in class - php

Question

I have a class that running inside a form to talk to a database, however the variables I'm using are returning errors. I have searched google but I cannot get a clear answer to my problem. Here are the errors, I've probably missed something obvious...hopefully:
Notice: Undefined variable: beer_name in /home/carlton/public_html/PHPproject/models/beer.php on line 28
Notice: Undefined variable: beer_type in /home/carlton/public_html/PHPproject/models/beer.php on line 35
Notice: Undefined variable: beer_abv in /home/carlton/public_html/PHPproject/models/beer.php on line 42
Notice: Undefined variable: beer_rating in /home/carlton/public_html/PHPproject/models/beer.php on line 49
Notice: Undefined variable: BeerEditor in /home/carlton/public_html/PHPproject/forms/beeradded.php on line 38
Fatal error: Call to a member function addBeer() on a non-object in /home/carlton/public_html/PHPproject/forms/beeradded.php on line 38
Here is my class:
protected $beer_name; //varchar(45)
protected $beer_type; //varchar(45)
protected $beer_abv; //decimal(4,2) alcohol percentage ex. 06.50
protected $beer_rating; //char(10) 1 awful beer, 10 great beer
public function __construct($beer_name = null){
if ($beer_name !== null){
$this->setBeerName($beer_name);
}
//defaults
//$this->setBeerType($beer_type);
//$this->setBeerABV($beer_abv);
//$this->setBeerRating($beer_rating);
}
public function setBeerName(){
$this->beer_name = $beer_name;
}
public function getBeerName(){
return $this->beer_name;
}
public function setBeerType(){
$this->beer_type = $beer_type;
}
public function getBeerType(){
return $this->beer_type;
}
public function setBeerABV(){
$this->beer_abv = $beer_abv;
}
public function getBeerABV(){
return $this->beer_abv;
}
public function setBeerRating(){
$this->beer_rating = $beer_rating;
}
public function getBeerRating(){
return $this->beer_rating;
}
}
Here is my form:
<?php
session_start();
ini_set('display_errors', 1);
error_reporting(E_ALL); ini_set('display_errors', 1);
require "/home/carlton/public_html/PHPproject/allincludes.php";
//var_dump($_POST);
if ($_SESSION['logged_in']!="yes"){
header ("Location: unauth.php");
}
//if (count($_POST)>0){
//need to add in validation check here
//
//
//
//
//$validationErrors= 0;
//if(count($validationErrors == 0 )){
$form=$_POST;
$beer_name = $form['beer_name'];
$beer_type = $form['beer_type'];
$beer_abv = $form['beer_abv'];
$beer_rating = $form['beer_rating'];
// }
$new_beer = new Beer($beer_name);
$new_beer->setBeerType($beer_type);
$new_beer->setBeerABV($beer_abv);
$new_beer->setBeerRating($beer_rating);
$BeerEditor->addBeer($new_beer);
echo "Beer added.";
echo ' Back to add menu ';
//}

Answer 1

you forget to pass the argument, here:
public function setBeerName(){
$this->beer_name = $beer_name;
}
it should be:
public function setBeerName($beer_name){
$this->beer_name = $beer_name;
}
please check in function setBeerType, setBeerABV, setBeerRating too.