PDO - Class Not Found

Question

What’s going on

I created a static method to return the connection so I can use it on DAO, but in doing so it gives Class Not Found PDO.

Other Projects

The first thing a lot of people will think is, "The extension is not activated". Gentlemen, the extensions are properly activated and have already been used in other projects. I have here 2 other projects with PDO, but this time I tried to use Object Orientation in the best way possible, to make the code cleaner.

OBS: If anyone has any suggestions to make some class more 'beautiful', I will be open to modifications.

PDO Ativo

My Code

Class Entidadedao

<?php

namespace Presto\model;
use Presto\model\ConnectionFactory as ConnectionFactory ;

class EntidadeDAO {
    private $connection = null;

    public function __construct() {
        self::$connection = ConnectionFactory::getConnection();
    }
} 

Class Connectionfactory

<?php
namespace Presto\model;

class ConnectionFactory {

public static function getConnection() {
    $connection = null;
    $config = self::configureConnection();

    try {
        self::$conection = new PDO($config['databaseType'].':host='.$config['hostname'].';dbname='.$config['database'],$config['username'],$config['password']);
    }catch (PDOException $e) {
        echo $e->getMessage();
    }

    return self::$connection;
}

public static function configureConnection() {
    $config = array();

    $config['databaseType'] = 'pgsql';
    $config['hostname'] = '127.0.0.1';
    $config['database'] = 'minhaDatabase';
    $config['username'] = 'root';
    $config['password'] = 'password';

    return $config;
}
} 

Answer 1

Know how to interpret the error \Presto model PDO not found, when working with namespace, each backslash is a correct directory?

To use the PDO lib or native libraries you need to instantiate, use the backslash first, as it points to the root, i.e., the native PHP libraries.

Example: \PDO

public static function getConnection() {
    $connection = null;
    $config = self::configureConnection();

    try {
        self::$conection = new \PDO($config['databaseType'].':host='.$config['hostname'].';dbname='.$config['database'],$config['username'],$config['password']);
    }catch (\PDOException $e) {
        echo $e->getMessage();
    }

    return self::$connection;
}