<?php
/**
@title:PHP持久对象演示(app demo)
@version:1.1-dev
@author:axgle <axgle@126.com>
*/

$user=new app('user');
echo $user->next();

echo '<pre>';
print_r($user);

class app {
var $id;
var $file;

function app($file='default') {
$this->id=0;
$this->file="app_".$file;

$last=unserialize(@file_get_contents($this->file));
if($last instanceof $this) {
foreach($last as $key=>$val) {
$this->$key=$val;
}
}
}

function prev() {
return --$this->id;
}
function next() {
return ++$this->id;
}

function __destruct() {
file_put_contents($this->file,serialize($this));
}
}

?&gt;