Skip to content
Related Articles

Related Articles

PHP | SplObjectStorage removeAllExcept() Function
  • Last Updated : 23 Aug, 2019

The SplObjectStorage::removeAllExcept() function is an inbuilt function in PHP which is used to remove all objects from storage except for those contains by another storage.

Syntax:

int SplObjectStorage::removeAllExcept()

Parameters: This function accepts a single parameter $obj which specify object storage to be retain.

Return Value: This function does not return any value.

Below programs illustrate the SplObjectStorage::removeAllExcept() function in PHP:



Program 1:




<?php
  
$obj1 = new StdClass;
$obj2 = new StdClass;
$obj3 = new StdClass;
  
$gfg1 = new SplObjectStorage();
$gfg1[$obj1] = "Geeks";
  
$gfg2 = new SplObjectStorage();
$gfg2[$obj1] = "GFG";
$gfg2[$obj2] = "GeeksClasses";
$gfg2[$obj3] = "SUDO";
  
// Count all existing objects
var_dump(count($gfg2));
  
// Remove all objects of $gfg2 from $gfg2
$gfg2->removeAllExcept($gfg1);
  
// Print result after removeAll
var_dump(count($gfg2));
?>
Output:
int(3)
int(1)

Program 2:




<?php
  
$obj1 = new StdClass;
$obj2 = new StdClass;
  
$gfg1 = new SplObjectStorage();
$gfg1[$obj1] = "Geeks";
  
$gfg2 = new SplObjectStorage();
$gfg2[$obj1] = "GFG";
$gfg2[$obj2] = "GeeksClasses";
  
// Count and print all existing objects
var_dump(count($gfg2));
  
// Remove all objects of $gfg1 from $gfg2
$gfg2->removeAllExcept($gfg1);
  
// Print result  
var_dump(count($gfg2));
  
// Result remains same
$gfg2->removeAllExcept($gfg2);
  
// Print result  
var_dump(count($gfg2));
  
?>
Output:
int(2)
int(1)
int(1)

Reference: https://www.php.net/manual/en/splobjectstorage.removeallexcept.php

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Recommended Articles
Page :