[php classes and objects] Object serialization

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Object sequence Serialize

Serialize object - store object in session

serialize() can serialize all values ​​in php to return a byte stream represented by a string.
The unserialize() function can change the string back to the original value of PHP.

Serializing an object will save all the variables of the object, but the methods of the object will not be saved, only the name of the class will be saved.

unserialize() object, the class of the object must be defined.
If you serialize an object of class A, a string related to class A and containing the values ​​of all variables of the object will be returned.
If you want to deserialize an object in another file, the object's class must be defined before deserializing, either by including a file that defines the class or by using the function spl_autoload_register().

<?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(&#39;store&#39;, $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(&#39;store&#39;);  $a = unserialize($s);  // 现在可以使用对象$a里面的函数 show_one()
  $a->show_one();?>

Use the function session_register() to save objects to the session. These objects will be automatically serialized at the end of each page, and automatically deserialized at the beginning of each page. So once the objects are saved in the session, they are available to pages throughout the application.

You can use the __sleep() and __wakeup() methods on the object to handle serialization/deserialization events.

session_register() Deprecated in PHP 5.3.0 and removed in PHP 5.4.0.

Object serialization

Serialize objects - store objects in the session

serialize() can serialize all php The value inside is returned as a string containing a byte stream.
The unserialize() function can change the string back to the original value of PHP.

Serializing an object will save all the variables of the object, but the methods of the object will not be saved, only the name of the class will be saved.

unserialize() object, the class of the object must be defined.
If you serialize an object of class A, a string related to class A and containing the values ​​of all variables of the object will be returned.
If you want to deserialize an object in another file, the object's class must be defined before deserializing, either by including a file that defines the class or by using the function spl_autoload_register().

<?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(&#39;store&#39;, $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(&#39;store&#39;);  $a = unserialize($s);  // 现在可以使用对象$a里面的函数 show_one()
  $a->show_one();?>

Use the function session_register() to save objects to the session. These objects will be automatically serialized at the end of each page, and automatically deserialized at the beginning of each page. So once the objects are saved in the session, they are available to pages throughout the application.

You can use the __sleep() and __wakeup() methods on the object to handle serialization/deserialization events.

session_register() Deprecated in PHP 5.3.0 and removed in PHP 5.4.0.

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