1.构造函数传参 2.__get和__set实现,当调用不存在的属性的时候,可以取值和赋值到data属性数组 3.__sleep实现,当序列化对象的时候,只序列化data属性数组和类内初始化定义的字段 4.__isset实现,可以判断属性是否存在,通过判断data属性数组 5.toArray方法实现,返回data属性数组 6.记录了构造初始化后,动态添加的属性字段
<?php
class Sina_Data_Object
{
protected $data = array();
private $changes = array();
private $newFlag = true;
public function __construct($data = array()){
if (empty($data)) {
$this->newFlag = true;
} else {
$this->newFlag = false;
foreach ($data as $k => $v) {
$this->data[$k] = $v;
}
}
}
public function __isset($name){
return isset($this->data[$name]);
}
public function __get($name){
if(!array_key_exists($name, $this->data)){
return null;
}
return $this->data[$name];
}
public function __set($name, $value){
$this->data[$name] = $value;
if (!$this->newFlag) {
$this->changes[$name] = $value;
}
}
public function __sleep(){
return array('data');
}
public function toArray(){
return $this->data;
}
public function isNew(){
return $this->newFlag;
}
public function clearNewFlag(){
$this->newFlag = false;
}
public function isModified()
{
return (!empty($this->changes));
}
public function getChanges()
{
return $this->changes;
}
public function clearChanges()
{
$this->changes = array();
}
}
class Setting extends Sina_Data_Object{
const STATUS=1;
public $other='aaa';
public function __construct($data=array()){
parent::__construct($data);
}
}
//初始化对象
$data=array('user'=>'taoshihan');
$setting=new Setting($data);
//动态增加属性
$setting->age=100;
var_dump($setting);
/*
object(Setting)#1 (4) {
["other"]=>
string(3) "aaa"
["data":protected]=>
array(2) {
["user"]=>
string(9) "taoshihan"
["age"]=>
int(100)
}
["changes":"Sina_Data_Object":private]=>
array(1) {
["age"]=>
int(100)
}
["newFlag":"Sina_Data_Object":private]=>
bool(false)
}
*/
//动态改变初始化的字段
$setting->other='bbbb';
//序列化对象
$serializeSetting=serialize($setting);
//反序列化对象
$setting2=unserialize($serializeSetting);
var_dump($setting2);
/*
object(Setting)#2 (4) {
["other"]=>
string(3) "aaa" ########反序列化回来这里还是aaa
["data":protected]=>
array(3) {
["user"]=>
string(9) "taoshihan"
["age"]=>
int(100)
}
["changes":"Sina_Data_Object":private]=>
array(0) { ##########change属性里面的数据没有序列化进去
}
["newFlag":"Sina_Data_Object":private]=>
bool(true) #########反序列化回来这里是true
}
*/