SplObjectStorage::attach

(PHP 5 >= 5.1.0, PHP 7)

SplObjectStorage::attach — Adds an object in the storage

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

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

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object

The object to add.

data

The data to associate with the object.

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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]);

?>

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NULL
string(5) "hello"

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5.3.0 Added the data parameter.

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