include php does not work

Put your include outside the class, like this:

<?php
error_reporting(-1); 
ini_set('display_errors', 'On');

$ds = DIRECTORY_SEPARATOR;

require_once __DIR__."{$ds}..{$ds}..{$ds}controller{$ds}conexao.php";

Class PrioridadeDao{

    private $conexao;

    public function __construct(){
        $this->conexao =  = new Conexao();
    }

    public function teste(){
        echo "Chega aqui sim";
    }


    public function selectAll(){
        echo "<br />CHEGA AQUI?";

        if(!$conexao->conecta()){
            exit;
        } else {
            $result = pg_query($conexao->conecta(), "SELECT * FROM prioridade");
            while ($consulta = @pg_fetch_array($result)){
                echo $consulta['nivel']." ".$consulta['nome'];
            }
            $conexaoObj->encerra($conexao->conecta());
        }
    }
}

The scope of a class must be to create properties (context variables) and methods (class functions). Class requests that will be used by the class in question must be entered before the class declaration.

Correct in working with OPP, is to define your configuration files in a folder called Config , the Controller directory, as the name itself says is to send and receive commands to the view or model. And your connection file is in the wrong place.

Includes with% relative% are problematic

require_once '../../controller/conexao.php'

Use absolute paths, ie include the full path of the file, a simple way to do this is to set this value to a constant and be called by a paths .

define('CONFIG', dirname(dirname(__FILE__)). 'Config'. DIRECTORY_SEPARATOR);

(PHP 5 => v5.3)

define('CONFIG', dirname(dirname(__DIR__)). 'Config'. DIRECTORY_SEPARATOR);

Then just include the file where you want it.

require_once CONFIG . 'conexao.php';

If you want to include conexao.php within prioridade_dao.php it would look like this:

require_once '../../controller/conexao.php';

* If you can not include it will give error and the error will be exposed.

The error in your code is that you are doing the inclusion inside the test function but it is not called as soon as there is no inclusion (try to have a simpler architecture because it minimizes the chances of getting out of control). make the direct inclusion just below <?php as I did above.