The SplObjectStorage class

(PHP 5 >= 5.3.0, PHP 7)

Introducere

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.

Sinopsisul clasei

SplObjectStorage implements Countable , Iterator , Serializable , ArrayAccess {
/* Metode */
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
}

Exemple

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));
?>

Exemplul de mai sus va afișa:

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]);
}
?>

Exemplul de mai sus va afișa:

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

Cuprins