(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::attach — Adds an object in the storage
Adds an object inside the storage, and optionally associate it to some data.
No value is returned.
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"