Note that static members of an object are not serialized.所有php里面的值都可以使用函数serialize()来返回一个包含字节流的字符串来表示。unserialize()函数能够重新把字符串变回php原来的值。 序列化一个对象将会保存对象的所有变量，但是不会保存对象的方法，只会保存类的名字。
为了能够unserialize()一个对象，这个对象的类必须已经定义过。如果序列化类A的一个对象，将会返回一个跟类A相关，而且包含了对象所有变量值的字符串。 如果要想在另外一个文件中解序列化一个对象，这个对象的类必须在解序列化之前定义，可以通过包含一个定义该类的文件或使用函数spl_autoload_register()来实现。
<?php
// classa.inc:
class A {
public $one = 1;
public function show_one() {
echo $this->one;
}
}
// page1.php:
include("classa.inc");
$a = new A;
$s = serialize($a);
// 把变量$s保存起来以便文件page2.php能够读到
file_put_contents('store', $s);
// page2.php:
// 要正确了解序列化，必须包含下面一个文件
include("classa.inc");
$s = file_get_contents('store');
$a = unserialize($s);
// 现在可以使用对象$a里面的函数 show_one()
$a->show_one();
?>当一个应用程序使用函数session_register()来保存对象到会话中时，在每个页面结束的时候这些对象都会自动序列化，而在每个页面开始的时候又自动解序列化。 所以一旦对象被保存在会话中，整个应用程序的页面都能使用这些对象。但是，session_register()在php5.4.0之后被移除了。
在应用程序中序列化对象以便在之后使用，强烈推荐在整个应用程序都包含对象的类的定义。 不然有可能出现在解序列化对象的时候，没有找到该对象的类的定义，从而把没有方法的类__PHP_Incomplete_Class_Name作为该对象的类，导致返回一个没有用的对象。
所以在上面的例子中，当运行session_register("a")，把变量$a放在会话里之后，需要在每个页面都包含文件classa.inc，而不是只有文件page1.php和page2.php。
Reading this page you'd be left with the impression that a class's `serialize` and `unserialize` methods are unrelated to the `serialize` and `unserialize` core functions; that only `__sleep` and `__unsleep` allow you to customize an object's serialization interface. But look at http://php.net/manual/en/class.serializable.php and you'll see that there is a more straightforward way to control how a user-defined object is serialized and unserialized.class UnSerializer {
public function __construct($filename_with_path) { /* Input the Filename */
$this->filename = $filename_with_path;
if ($this->filename == true) {
return true;
} else {
echo 'File Name Error';
}
}
public function check_file_validity() {
$this->validity = file_exists($this->filename);
if ($this->validity == true) {
return true;
} else {
echo 'File Not Found !';
}
}
public function getting_file_content() {
if ($this->validity == true) {
$this->content = file_get_contents($this->filename);
if ($this->content == true) {
return true;
} else {
echo 'We Can\'t Reach to the Data';
}
} else {
echo 'File Not Found !';
}
}
public function get_unserial_data() {
$this->check_file_validity();
$this->getting_file_content();
if (!is_null($this->content)) {
$this->unserializedval = unserialize($this->content);
if ($this->unserializedval == true) {
return true;
}
} else {
echo 'We Can\'t Reach to the Data';
}
}
public function get_unserialized_value() {
return $this->unserializedval;
}
}
$object = new UnSerializer('example_directory/filename'); /* Enter file name */
$object->get_unserial_data();
var_dump($object->get_unserialized_value());It is important to note that you cannot use the following characters in any array that gets serialized or deserializing will fail: single quote, double quote, colon, or semicolon. To get around this, use the base64_encode function after using serialize when you save the data. When you need to unserialize use the base64_decode function first then unserialize.PHP OBJECT SERIALIZATION
I use a database to store info rather than storing PHP Objects themselves. However, I find that having a PHP Object acting as an interface to my db is way useful. For example, suppose I have a TABLE called 'user' that looks like this.
CREATE TABLE user {
user_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT,
user_first VARCHAR(24) NOT NULL,
user_last VARCHAR(24) NOT NULL,
PRIMARY KEY (user_id)
);
Then I would create a PHP Class definition like so:
<?php
require('includes/db_connect.php');
class User
{
protected $user_id;
protected $user_first;
protected $user_last;
public function __construct($id, $first, $last)
{
$this->user_id = $id;
$this->user_first = $first;
$this->user_last = $last;
}
# FUNCTIONS TO RETRIEVE INFO - DESERIALIZE.
public static function db_user_by_id($dbc, $id)
{
$query = "SELECT * FROM user WHERE user_id=$id LIMIT 1";
return User::db_select($dbc, $query);
}
public static function db_user_by_name($dbc, $first, $last)
{
$query = "SELECT * FROM user WHERE user_first='$first' AND user_last='$last' LIMIT 1";
return User::db_select($dbc, $query);
}
protected static function db_select($dbc, $query);
{
$result = mysqli_query($dbc, $query);
if(mysqli_num_rows($result) > 0)
{
$row = mysqli_fetch_array($result, MYSQLI_NUM);
return new User($row[0], $row[1], $row[2]);
}
}
# FUNCTIONS TO SAVE INFO - SERIALIZE.
public function insert($dbc)
{
$query = "INSERT INTO user VALUES (NULL, '$this->user_first', '$this->user_last')";
$result = mysqli_query($dbc, $query);
}
public function update($dbc)
{
$query = "UPDATE user SET user_first='$this->user_first', user_last='$this->user_last' WHERE user_id=$this->id LIMIT 1";
$result = mysqli_query($dbc, $query);
}
# GETTER and SETTER FUNCTIONS - DO NOT ALLOW SETTING OF ID
public function getId() {return $this->user_id;)
public function getFirst() {return $this->user_first;)
public function getLast() {return $this->user_last;)
public function setFirst($first) {$this->user_first = $first;}
public function setLast($last) {$this->user_last = $last;}
# CUSTOM FUNCTIONS
public function getFullName() {return $this->user_first . ' ' . $this->user_last;}
public function getLastFirst() {return $this->user_last . ', ' . $this->user_first;}
}
?>
Using PHP Objects for SERIALIZATION and DESERIALIZATION is now super-easy, for example:
<?php
require('User.php');
// INSERT a new user.
$user = new User(0, 'Frank', 'American');
$user->insert($dbc); // done!
// UPDATE an existing user.
$user = User::db_user_by_id($dbc, 223);
$user->setFirst('Johnny');
$user->update($dbc); // done!
mysqli_close($dbc);
?>