Checks if the storage contains a specific object

# SplObjectStorage::contains

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

SplObjectStorage::contains — Checks if the storage contains a specific object

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 function SplObjectStorage::contains(object `$object`): bool

Checks if the storage contains the object provided.

### 参数

`object`

  The object to look for.

### 返回值

Returns `true` if the object is in the storage, `false` otherwise.

### 更新日志

版本 | 说明
--- | ---
8.5.0 | This method has been deprecated in favor of SplObjectStorage::offsetExists().

### 示例

示例 #1 SplObjectStorage::contains() example

    <?php
    $o1 = new stdClass;
    $o2 = new stdClass;

    $s = new SplObjectStorage();

    $s[$o1] = "hello";
    var_dump($s->contains($o1));
    var_dump($s->contains($o2));
    ?>

以上示例的输出类似于：

    bool(true)
    bool(false)

### 参见

- SplObjectStorage::offsetExists() - Checks whether an object exists in the storage

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