PHP SplObjectStorage offsetUnset() Function

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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, "zambiatek"); 
  
// 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, "zambiatek"); 
$str->attach($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)); 
?>