<?php

//total instanciation
include_once( 'phpsimpledb.class.php' );
Global $oBDD;
$oBDD = new PHPSIMPLEDB();

//creation and loading of "user"
$oUser = $oBDD->getObject( "users" );
$oUser->load( 645 );

//update of "user"
$oUser->setData_field( "email", "email@phpsimpledb.com" );
$oUser->save();

?>