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
<?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
<?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