(PHP 5 >= 5.3.0, PHP 7)
SplObjectStorage::offsetExists — Checks whether an object exists in the storage
public SplObjectStorage::offsetExists ( object $object ) : bool
Checks whether an object exists in the storage.
Note:
SplObjectStorage::offsetExists() is an alias of SplObjectStorage::contains().
object
The object to look for.
Returns true
if the object exists in the storage, and false
otherwise.
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)
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https://www.php.net/manual/en/splobjectstorage.offsetexists.php