(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::attach — Adds an object in the storage
This function has been DEPRECATED as of PHP 8.5.0. Relying on this function is highly discouraged.
Adds an object inside the storage, and optionally associate it to some data.
没有返回值。
示例 #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]);
?>以上示例的输出类似于：
NULL string(5) "hello"