SplObjectStorage::attach

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplObjectStorage::attach — Adds an object in the storage

Description

public SplObjectStorage::attach(object $object, mixed $info = null): void

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

Parameters

object

The object to add.

info

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"

See Also