SplObjectStorage::offsetExists
(PHP 5 >= 5.3.0, PHP 7)
SplObjectStorage::offsetExists — Checks whether an object exists in the storage
Description
public bool SplObjectStorage::offsetExists ( object $object )Checks whether an object exists in the storage.
Note: SplObjectStorage::offsetExists() is an alias of SplObjectStorage::contains().
Parameters
object
The object to look for.
Return Values
Returns TRUE if the object exists in the storage, and FALSE otherwise.
Examples
Example #1 SplObjectStorage::offsetExists() example
<?php
$s?=?new?SplObjectStorage;
$o1?=?new?StdClass;
$o2?=?new?StdClass;
$s->attach($o1);
var_dump($s->offsetExists($o1));?//?Similar?to?isset($s[$o1])
var_dump($s->offsetExists($o2));?//?Similar?to?isset($s[$o2])
?>The above example will output something similar to:
bool(true)
bool(false)See Also
- SplObjectStorage::offsetSet() - Associates data to an object in the storage
- SplObjectStorage::offsetGet() - Returns the data associated with an object
- SplObjectStorage::offsetUnset() - Removes an object from the storage
SplObjectStorage::offsetGet →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
