SplObjectStorage::attach

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

SplObjectStorage::attach — Adds an object in the storage

警告

此函数自 PHP 8.5.0 起弃用。强烈建议不要应用此函数。

说明

#[\Deprecated]
public SplObjectStorage::attach(object $object, mixed $info = null): void

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

参数

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

返回值

没有返回值。

示例

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"

参见

SplObjectStorage::detach() - Removes an object from the storage
SplObjectStorage::offsetSet() - Associates data to an object in the storage