Although `offsetSet` is supposed to be an alias to `attach`, real-world results do not indicate that. When extending the SplObjectStorage class, it's expected that a modification to `attach` would also affect `offsetSet`. However, it seems they need to both be extended. Consider the results below...
<?php
declare(strict_types=1);
class CustomSplObjectStorage extends SplObjectStorage
{
public function offsetSet(mixed $object, mixed $info = null): void
{
print("offsetSet called\n");
parent::offsetSet($object, $info);
}
public function attach(mixed $object, mixed $info = null): void
{
print("attach called\n");
parent::attach($object, $info);
}
}
$a = new CustomSplObjectStorage();
$a[new stdClass()] = 'ok';
$a->attach(new stdClass(), 'ok');
?>
This prints:
```
offsetSet called
attach called
```
While we would expect...
```
offsetSet called
attach called
attach called
```
... if `offsetSet` was a true alias of `attach`. I'm not sure if this is intentional or not.
SplObjectStorage::offsetSet
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplObjectStorage::offsetSet — ストレージ内のオブジェクトにデータを関連づける
説明
ストレージ内のオブジェクトにデータを関連づけます。
注意:
SplObjectStorage::offsetSet() は、 SplObjectStorage::attach() のエイリアスです。
戻り値
値を返しません。
例
例1 SplObjectStorage::offsetSet() の例
<?php
$s = new SplObjectStorage;
$o1 = new stdClass;
$s->offsetSet($o1, "hello"); // $s[$o1] = "hello"; と同等
var_dump($s[$o1]);
?>上の例の出力は、 たとえば以下のようになります。
string(5) "hello"
参考
- SplObjectStorage::attach() - オブジェクトをストレージに追加する
- SplObjectStorage::offsetGet() - オブジェクトに関連づけられたデータを返す
- SplObjectStorage::offsetExists() - オブジェクトがストレージ内に存在するかどうかを調べる
- SplObjectStorage::offsetUnset() - ストレージからオブジェクトを取り除く
add a note
User Contributed Notes 1 note
aderh ¶
1 year ago
