serializable(3) [php man page]

SERIALIZABLE(3) 							 1							   SERIALIZABLE(3)

The Serializable interface

INTRODUCTION

	Interface for customized serializing.

	Classes  that  implement  this	interface  no longer support __sleep() and __wakeup(). The method serialize is called whenever an instance
       needs to be serialized. This does not invoke __destruct() or has any other side effect unless programmed inside the method. When  the  data
       is unserialized the class is known and the appropriate unserialize() method is called as a constructor instead of calling __construct(). If
       you need to execute the standard constructor you may do so in the method.

INTERFACE SYNOPSIS

       Serializable

       Serializable

       Methods

       o abstractpublic string Serializable::serialize (void  )

       o abstractpublic void Serializable::unserialize (string	$serialized)

       Example #1

	      Basic usage

	      <?php
	      class obj implements Serializable {
		  private $data;
		  public function __construct() {
		      $this->data = "My private data";
		  }
		  public function serialize() {
		      return serialize($this->data);
		  }
		  public function unserialize($data) {
		      $this->data = unserialize($data);
		  }
		  public function getData() {
		      return $this->data;
		  }
	      }

	      $obj = new obj;
	      $ser = serialize($obj);

	      var_dump($ser);

	      $newobj = unserialize($ser);

	      var_dump($newobj->getData());
	      ?>

	      The above example will output something similar to:

	      string(38) "C:3:"obj":23:{s:15:"My private data";}"
	      string(15) "My private data"

PHP Documentation Group 													   SERIALIZABLE(3)

ARRAYACCESS(3)								 1							    ARRAYACCESS(3)

The ArrayAccess interface

INTRODUCTION

	Interface to provide accessing objects as arrays.

INTERFACE SYNOPSIS

       ArrayAccess

       ArrayAccess

       Methods

       o abstractpublic boolean ArrayAccess::offsetExists (mixed  $offset)

       o abstractpublic mixed ArrayAccess::offsetGet (mixed  $offset)

       o abstractpublic void ArrayAccess::offsetSet (mixed  $offset, mixed  $value)

       o abstractpublic void ArrayAccess::offsetUnset (mixed  $offset)

       Example #1

	      Basic usage

	      <?php
	      class obj implements ArrayAccess {
		  private $container = array();

		  public function __construct() {
		      $this->container = array(
			  "one"   => 1,
			  "two"   => 2,
			  "three" => 3,
		      );
		  }

		  public function offsetSet($offset, $value) {
		      if (is_null($offset)) {
			  $this->container[] = $value;
		      } else {
			  $this->container[$offset] = $value;
		      }
		  }

		  public function offsetExists($offset) {
		      return isset($this->container[$offset]);
		  }

		  public function offsetUnset($offset) {
		      unset($this->container[$offset]);
		  }

		  public function offsetGet($offset) {
		      return isset($this->container[$offset]) ? $this->container[$offset] : null;
		  }
	      }

	      $obj = new obj;

	      var_dump(isset($obj["two"]));
	      var_dump($obj["two"]);
	      unset($obj["two"]);
	      var_dump(isset($obj["two"]));
	      $obj["two"] = "A value";
	      var_dump($obj["two"]);
	      $obj[] = 'Append 1';
	      $obj[] = 'Append 2';
	      $obj[] = 'Append 3';
	      print_r($obj);
	      ?>

	      The above example will output something similar to:

	      bool(true)
	      int(2)
	      bool(false)
	      string(7) "A value"
	      obj Object
	      (
		  [container:obj:private] => Array
		      (
			  [one] => 1
			  [three] => 3
			  [two] => A value
			  [0] => Append 1
			  [1] => Append 2
			  [2] => Append 3
		      )

	      )

PHP Documentation Group 													    ARRAYACCESS(3)