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PHP | Ds\Set add() Function

Last Updated : 11 Jul, 2025
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The Ds\Set::add() function is an inbuilt function in PHP which is used to add values to the set. Syntax: 
void public Ds\Set::add( $values )
Parameters: This function accepts a single parameter $values which holds many values to be added in the set. Return value: This function does not return any values. Below programs illustrate the Ds\Set::add() function in PHP: Program 1: php 
<?php

// Declare an empty set
$set = new \Ds\Set();

// Use add() function to
// add elements to the set
$set->add(1);

$set->add("Geeks");

$set->add("G");

$set->add(10);

var_dump($set);
?>
Output: 
object(Ds\Set)#1 (4) {
  [0]=>
  int(1)
  [1]=>
  string(5) "Geeks"
  [2]=>
  string(1) "G"
  [3]=>
  int(10)
}
Program 2: php 
<?php

// Declare an empty set
$set = new \Ds\Set();

// Use add() function to
// add elements to the set
$set->add(10, 20, 30, "Geeks", "for");

print_r($set);
?>
Output: 
Ds\Set Object
(
    [0] => 10
    [1] => 20
    [2] => 30
    [3] => Geeks
    [4] => for
)
Reference: https://www.php.net/manual/en/ds-set.add.php

J

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