Class autoload not working - php

Question

I'm a beginner in PHP development and I'm facing a problem in my development in PHP OO. I saw is better use the autoload() function than include each file of PHP Class.
My doubt is: Why my autoload function does not work?
Follow bellow my code:
<?php
function __autoload($class)
{
include_once "model/{$class}.class.php";
}
$avaliacaoLocal = new AvaliacaoLocal();
$avaliacaoLocal->setId(1);
$avaliacaoLocal->setIdLocal(2);
$avaliacaoLocal->setComentarios("Comentários de Pedro");
$avaliacaoLocal->setIdPessoaCliente(3);
$avaliacaoLocal->setValor(5);
var_dump($avaliacaoLocal);
File AvaliacaoLocal.class.php
<?php
namespace model;
class AvaliacaoLocal
{
private $id;
private $valor;
private $comentarios;
private $idLocal;
private $idPessoaCliente;
public function __construct(){
$this->clear();
}
public function clear(){
$this->id = 0;
$this->valor = 0;
$this->comentarios = "";
$this->idLocal = null;
$this->idPessoaCliente = null;
}
public function getId()
{
return $this->id;
}
public function setId($id)
{
$this->id = $id;
}
public function getValor()
{
return $this->valor;
}
public function setValor($valor)
{
$this->valor = $valor;
}
public function getComentarios()
{
return $this->comentarios;
}
public function setComentarios($comentarios)
{
$this->comentarios = $comentarios;
}
public function getIdLocal()
{
return $this->idLocal;
}
public function setIdLocal($idLocal)
{
$this->idLocal = $idLocal;
}
public function getIdPessoaCliente()
{
return $this->idPessoaCliente;
}
public function setIdPessoaCliente($idPessoaCliente)
{
$this->idPessoaCliente = $idPessoaCliente;
}
}
The error:
PHP Fatal error: Class 'AvaliacaoLocal' not found in C:\Users\Pedro
........\index.php on line 14
UPDATE:
When i use include the PHP returns the same error:
Fatal error: Class 'AvaliacaoLocal' not found in C:\Program
Files\VertrigoServ\www\system\index.php on line 10
i've change folder to verify if could be it.

Answer 1

The class is declared belonging to a namespace, you have to call it in this way:
$avaliacaoLocal = new \model\AvaliacaoLocal();
But now, the namespace is also included in $class, so the autoload function needs to handle that:
function __autoload($class)
{
$file = str_replace(array('_', '\\'), '/', $class) . '.php';
if (is_file($file)) {
require $file;
}
}
This function takes $class value and replace every \ (and _) from the namespace with a / to get the file name.