The SplObjectStorage::offsetExists() function is an inbuilt function in PHP which is used to check the object exist in storage or not.
Syntax:
bool SplObjectStorage::offsetExists($object)
Parameters: This function accepts a single parameter $object which specifies the object to be checked.
Return Value: This function returns true if the object exists in storage otherwise return false.
Below programs illustrate the SplObjectStorage::offsetExists() function in PHP:
Program 1:
<?php
// Create an empty SplObjectStorage
$str = new SplObjectStorage;
$obj = new StdClass;
// Attach $obj to $str
$str->attach($obj);
// Print Result
var_dump($str->offsetExists($obj));
?>
Output:
bool(true)
Program 2:
<?php
// Create an Empty SplObjectStorage
$str = new SplObjectStorage();
$obj1 = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
$obj4 = new StdClass;
// Attach only three objects
$str->attach($obj1, "GeksforGeeks");
$str->attach($obj2, "GFG");
$str->attach($obj3);
// Print result
var_dump($str->offsetExists($obj1));
var_dump($str->offsetExists($obj2));
var_dump($str->offsetExists($obj4));
var_dump($str->offsetExists($obj3));
?>
Output:
bool(true) bool(true) bool(false) bool(true)
Reference: https://www.php.net/manual/en/splobjectstorage.offsetexists.php