The SplObjectStorage::offsetUnset() function is an inbuilt function in PHP that is used to set the object from the storage.
Syntax:
void SplObjectStorage::offsetUnset( $object )
Parameters: This function accepts a single parameter $object which specifies the to be unset.
Return Value: This function does not return any value.
The below programs illustrate the SplObjectStorage::offsetUnset() function in PHP.
Program 1:
<?php
// Create an empty SplObjectStorage
$str = new SplObjectStorage;
$obj = new StdClass;
// Set offset $obj to $str
$str->attach($obj, "GeeksforGeeks");
// Print Result before
var_dump(count($str));
// Unset object from storage
$str->offsetUnset($obj);
// Print Result after
var_dump(count($str));
?>
Output:
int(1) int(0)
Program 2:
<?php
// Create an Empty SplObjectStorage
$str = new SplObjectStorage();
$obj1 = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
$obj4 = new StdClass;
$str->attach($obj1, "GeeksforGeeks");
$str->attach($obj2, "GFG");
$str->attach($obj3);
$str->attach($obj4, "DSA");
// Print Result before
var_dump(count($str));
// Unset object from storage
$str->offsetUnset($obj1);
$str->offsetUnset($obj2);
$str->offsetUnset($obj3);
$str->offsetUnset($obj4);
// Print Result after
var_dump(count($str));
?>
Output:
int(4) int(0)
Reference: https://www.php.net/manual/en/splobjectstorage.offsetunset.php