Untitled

├── app
    └── Conn
        └── Conn.php
└── vendor
    └── composer
    └── autoload.php
└── composer.json
└── index.php
└── README.md

<?php

namespace LelvtexConec;

class Conn
{
    private $user;
    private $pass;
    private $dbsa;
    private $host;

    private $connon;
    private $conn;


    //CONSTRUCTOR

    public function __construct($user, $pass, $dbsa, $host)
    {
        $this->connect($user, $pass, $dbsa, $host);
    }


    //PRIVATE METHODS
    private function connect($user, $pass, $dbsa, $host)
    {
        $this->connon = false;
        $this->user = strip_tags(trim($user));
        $this->pass = strip_tags(trim($pass));
        $this->dbsa = strip_tags(trim($dbsa));
        $this->host = $host;


        try {
            if (!$this->connon) {
                $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbsa;
                $options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',);
                $this->conn = new PDO($dsn, $this->user, $this->pass, $options);
                $this->connon = true;
                echo "Conectado com sucesso!";
            }
        } catch (PDOException $e) {
            echo $e->getMessage();
        }

    }
}

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <title>Livre e Leve</title>
</head>
<body>
<?php
require 'vendor/autoload.php';

use LelvtexConecConn;

$conn = new Conn('root', '', 'livreelevevtex', 'localhost');
var_dump($conn);
?>
</body>
</html>

<?php

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);

return array(
    'Lelvtex\' => array($baseDir . '/app'),
);

{
    "name": "lucascar/livreelevevtex",
    "description": "Projeto de Teste para Livre e Leve vtex",
    "type": "library",
    "license": "MIT",
    "authors": [
        {
            "name": "Lucas de Carvalho",
            "email": "contato@lucasdecarvalho.com"
        }
    ],
    "minimum-stability": "dev",
    "autoload" : {
        "psr-4" : {
            "Lelvtex\" : "app/"
        }
    }
}