dbclass

<?php
class db extends mysqli
{
    protected static $instance;
    protected static $options = array();

    private function __construct() {
        $o = self::$options;

        // turn of error reporting
        mysqli_report(MYSQLI_REPORT_OFF);

        // connect to database
        @parent::__construct(isset($o['host'])   ? $o['host']   : 'localhost',
                             isset($o['user'])   ? $o['user']   : 'vmctrl',
                             isset($o['pass'])   ? $o['pass']   : 'xksdjue830x',
                             isset($o['dbname']) ? $o['dbname'] : 'virtualMachinesCtrl',
                             isset($o['port'])   ? $o['port']   : 3306,
                             isset($o['sock'])   ? $o['sock']   : false );

        // check if a connection established
        if( mysqli_connect_errno() ) {
            throw new exception(mysqli_connect_error(), mysqli_connect_errno()); 
        }
    }

    public static function getInstance() {
        if( !self::$instance ) {
            self::$instance = new self(); 
        }
        return self::$instance;
    }
    
    public function query($query) {
        if( !$this->real_query($query) ) {
            throw new exception( $this->error, $this->errno );
        }

        $result = new mysqli_result($this);
        return $result;
    }



}
?>