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PHP | Ds\Set merge() Function

Last Updated : 16 Aug, 2019
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The Ds\Set::merge() function is an inbuilt function in PHP which returns a set after adding all given values to the set. Syntax: 
Ds\Set public Ds\Set::merge ( mixed $values )
Parameters: This function accepts single parameter $values which holds the elements. Return Value: This function returns the set adding all the elements. Below programs illustrate the Ds\Set::merge() function in PHP: Program 1: php 
<?php 

// Create new set
$set = new \Ds\Set([12, 15, 18, 20]); 

// Merge the set element and display it 
var_dump($set->merge([1, 2, 3])); 

// Display the set element 
var_dump($set) 
?>
Output: 
object(Ds\Set)#2 (7) {
  [0]=>
  int(12)
  [1]=>
  int(15)
  [2]=>
  int(18)
  [3]=>
  int(20)
  [4]=>
  int(1)
  [5]=>
  int(2)
  [6]=>
  int(3)
}
object(Ds\Set)#1 (4) {
  [0]=>
  int(12)
  [1]=>
  int(15)
  [2]=>
  int(18)
  [3]=>
  int(20)
}
Program 2: php 
<?php 

// Create new set
$set = new \Ds\Set([12, 15, 18, 20]); 

// Merge the set element and display it 
var_dump($set->merge(["G", "E", "E", "k", "S"])); 

?>
Output: 
object(Ds\Set)#2 (8) {
  [0]=>
  int(12)
  [1]=>
  int(15)
  [2]=>
  int(18)
  [3]=>
  int(20)
  [4]=>
  string(1) "G"
  [5]=>
  string(1) "E"
  [6]=>
  string(1) "k"
  [7]=>
  string(1) "S"
}
Reference: https://www.php.net/manual/en/ds-set.merge.php

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