lpwd-php-portfolio/lib/database.php

<?php

/**
 * @return PDO Une instance PDO
 */
function getDatabaseConnection()
{
    static $pdo;

    if ($pdo !== null) {
        return $pdo;
    }

    $dsn = 'mysql:dbname=portfolio;host=localhost;charset=utf8';
    $user = 'portfolio';
    $password = 'portfolio';

    $pdo = new PDO($dsn, $user, $password);

    return $pdo;
}