database_crud-pdo-oop

<?php
    /**
    * Database
    */
    class Database
    {
        private $hostname   = "localhost";
        private $db_name    = "blog_bio";
        private $username   = "root";
        private $password   = "";
        public $conn;

        public function dbConnection()
        {
            $this->conn = null;
            try {
                $this->conn =new PDO("mysql:host=" . $this->hostname . ";dbname=" . $this->db_name, $this->username, $this->password);
                $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            } catch (PDOException $e) {
                echo "Connection error: " . $e->getMessage();
            }
            return $this->conn;
        }
    }
 ?>