conn

<?php

    class DatabaseConnection
    {
        protected $hostname;
        protected $database;
        protected $username;
        protected $password;

        /**
         * hostname setzen
         * @param string hostname
         */
        public function setHostname($hostname)
        {
            $this->hostname = $hostname;
        }

        /**
         * db setzen
         * @param string database
         */
        public function setDatabase($database)
        {
            $this->database = $database;
        }

        /**
         * sets username
         * @param string username
         */
        public function setUsername($username)
        {
            $this->username = $username;
        }

        /**
         * sets password
         * @param string password
         */
        public function setPassword($password)
        {
            $this->password = $password;
        }

        /**
         * return mysqliobj
         * @return mysqli
         */
        public function getConnection()
        {
            return new mysqli($this->hostname, $this->username, $this->password, $this->database);
            if (!mysqli_connect_errno()) {
                throw new Exception('Error: ' .mysqli_connect_errno());
            }
        }
    }
?>