DB.php

<?php

class DB {
    // host localhost / 127.0.0.1
    private $host     = 'localhost';
    // username localhost, default root
    private $username = 'root';
    // isi kosong, defaultnya
    private $password = '';
    // nama database yang dipakai
    private $database = 'sarana_prasarana';
    public $db;
    // make sure we dont connnect database to every function
    public $mysqli;

    function __construct(){

        $this->mysqli = new mysqli($this->host,$this->username,$this->password,$this->database);

        if (mysqli_connect_error()) {
            die('Connect Error (' . mysqli_connect_errno() . ') '
                    . mysqli_connect_error());
        }
    }

}
?>