SplObjectStorage::attach

(PHP 5 >= 5.1.0, PHP 7)

SplObjectStorage::attach — Adds an object in the storage

Description

public void SplObjectStorage::attach ( object $object [, mixed $data = NULL ] )

Adds an object inside the storage, and optionally associate it to some data.

Parameters

object: The object to add.
data: The data to associate with the object.

Return Values

No value is returned.

Examples

Example #1 SplObjectStorage::attach() example


<?php
$o1 = new StdClass;
$o2 = new StdClass;
$s = new SplObjectStorage();
$s->attach($o1); // similar to $s[$o1] = NULL;
$s->attach($o2, "hello"); // similar to $s[$o2] = "hello";

var_dump($s[$o1]);
var_dump($s[$o2]);

?>

The above example will output something similar to:

NULL
string(5) "hello"

Changelog

Version	Description
5.3.0	Added the `data` parameter.

User Contributed Notes

rafal dot wrzeszcz at wrzasq dot pl

2 years ago


Better way (imho) is to call:

$storage->removeAll($storage);

Especially, that sometimes (had no time to investigate) removeAllExcept(new SplObjectStorage()) leaves some elements.