Eerste class

<?php 


interface Blauwdruk_Database
{
    public function connect();
    public function error();
    public function errno();
    public function escape($string);
    public function query($query);
    public function fetchArray($result);
    public function fetchRow($result);
    public function fetchAssoc($result);
    public function fetchObject($result);
    public function numRows($result);
    public function close();
}






class Mysqli_Database implements Blauwdruk_Database {
    private $_link;


    public function connect($server='', $username='', $password='', $db='') {
        $this->_link = mysqli_connect($server, $username, $password, $db);
    }


    public function error() {
        return mysqli_errno($this->_link);
    }


    public function errno() {
        return mysqli_error($this->_link);
    }


    public function escape($string) {
        return mysqli_real_escape_string( $this->_link, $string);
    }


    public function query($query) {
        return mysqli_query($this->_link, $query);
    }


    public function fetchArray($result) {
        return mysqli_fetch_array($result);
    }


    public function fetchRow($result) {
        return mysqli_fetch_row($result);
    }


    public function fetchAssoc($result) {
        return mysqli_fetch_assoc($result);
    }


    public function fetchObject($result) {
        return mysqli_fetch_object($result);
    }


    public function numRows($result) {
        return mysqli_num_rows($result);
    }


    public function close() {
        return mysqli_close($this->_link);
    }
}


?>