<?php
class database{
                    var $MyDatabase;
                    public function database($MyDatabase){
                           $this->MyDatabase= $MyDatabase;
                    }

    public function connect($host,$user = false , $password = false)
    {
                    $db = mysql_connect($host,$user,$pass);
                    $db = mysql_select_db(  $this->MyDatabase);
    }

    public function query($cosa,$dove,$quali,$where = false)
    {
        switch ($cosa)
        {

            case "select":
            $query = "select";
            $query .= $quali ." ";
            $query .= "from ".$dove ." ".$where;
            break;

            case "insert":
            $query = "insert into";
            $query .= $dove ."(";
            $query .= foreach ($where in $row){
                    $query .= $row ",";
            }
            $query .= "values"
            $query .= foreach ($quali in $row){
                    $query .= $row ",";
            }
            break;

            case "delete":
            $query = "delete from";
            $query .= $dove;
            $query .= $quali;
            break;

            case "update":
            $query = "update ";
            $query .= $dove;
            $query .= "set ";
            $query .= foreach ($where as $key => $value){
                    $query .= $value .","
            }
            break;
        }//end switch

            return mysql_query($query);


    }
}

    ?>
<?
$a = new database("nomedb");
$a->connect('127.0.0.1');
$a->query("select","tabella","*");
?>