The SplObjectStorage class

(PHP 5 >= 5.3.0, PHP 7)

���

The SplObjectStorage class provides a map from objects to data or, by ignoring data, an object set. This dual purpose can be useful in many cases involving the need to uniquely identify objects.

��ժҪ

SplObjectStorage implements Countable , Iterator , Serializable , ArrayAccess {
/* ���� */
public addAll ( SplObjectStorage $storage ) : void
public attach ( object $object [, mixed $data = NULL ] ) : void
public contains ( object $object ) : bool
public count ( void ) : int
public current ( void ) : object
public detach ( object $object ) : void
public getHash ( object $object ) : string
public getInfo ( void ) : mixed
public key ( void ) : int
public next ( void ) : void
public offsetExists ( object $object ) : bool
public offsetGet ( object $object ) : mixed
public offsetSet ( object $object [, mixed $data = NULL ] ) : void
public offsetUnset ( object $object ) : void
public removeAll ( SplObjectStorage $storage ) : void
public removeAllExcept ( SplObjectStorage $storage ) : void
public rewind ( void ) : void
public serialize ( void ) : string
public setInfo ( mixed $data ) : void
public unserialize ( string $serialized ) : void
public valid ( void ) : bool
}

����

Example #1 SplObjectStorage as a set

<?php
// As an object set
$s = new SplObjectStorage();

$o1 = new StdClass;
$o2 = new StdClass;
$o3 = new StdClass;

$s->attach($o1);
$s->attach($o2);

var_dump($s->contains($o1));
var_dump($s->contains($o2));
var_dump($s->contains($o3));

$s->detach($o2);

var_dump($s->contains($o1));
var_dump($s->contains($o2));
var_dump($s->contains($o3));
?>

�������̻������

bool(true)
bool(true)
bool(false)
bool(true)
bool(false)
bool(false)

Example #2 SplObjectStorage as a map

<?php
// As a map from objects to data
$s = new SplObjectStorage();

$o1 = new StdClass;
$o2 = new StdClass;
$o3 = new StdClass;

$s[$o1] = "data for object 1";
$s[$o2] = array(1,2,3);

if (isset($s[$o2])) {
    var_dump($s[$o2]);
}
?>

�������̻������

array(3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
}

Table of Contents