SplObjectStorage::attach

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

SplObjectStorage::attach — Adds an object in the storage

说明

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

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

参数

object

The object to add.

data

The data to associate with the object.

返回值

没有返回值。

范例

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]);

?>

以上例程的输出类似于：

NULL
string(5) "hello"

参见