Please wait while we load your page...
 

Announcements

PHP Manual :: The SplObjectStorage class



SplFixedArray::__wakeup || SplObjectStorage::addAll || Datastructures || PHP Manual

(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.

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

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));
?>

The above example will output:

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]);
}
?>

The above example will output:

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



SplFixedArray::__wakeup || SplObjectStorage::addAll || Datastructures || PHP Manual
Live Chat Not Available