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PHP | Ds\Stack __construct() Function
  • Last Updated : 30 Jul, 2019

The Ds\Stack::__construct() function is an inbuilt function in PHP which is used to create a new instance of stack.

Syntax:

public Ds\Stack::__construct( $values )

Parameters: This function accepts single parameter $values which holds the traversable object or array to use initial values.

Below programs illustrate the Ds\Stack::__construct() function in PHP:

Program 1:






<?php 
  
// Declare a new stack 
$stack = new \Ds\Stack(); 
print_r($stack); 
  
// Declare a new stack 
$stack = new \Ds\Stack(['G', 'E', 'K', 'S']); 
print_r($stack); 
  
?> 


Output:

Ds\Stack Object
(
)
Ds\Stack Object
(
    [0] => S
    [1] => K
    [2] => E
    [3] => G
)

Program 2:




<?php 
  
// Declare a new stack 
$stack = new \Ds\Stack([2, 3, 6, 7, 8]); 
var_dump($stack); 
  
// Declare a new stack 
$stack = new \Ds\Stack([2, 3, 5, 8, 9, 10]); 
var_dump($stack); 
  
?> 


Output:

object(Ds\Stack)#1 (5) {
  [0]=>
  int(8)
  [1]=>
  int(7)
  [2]=>
  int(6)
  [3]=>
  int(3)
  [4]=>
  int(2)
}
object(Ds\Stack)#2 (6) {
  [0]=>
  int(10)
  [1]=>
  int(9)
  [2]=>
  int(8)
  [3]=>
  int(5)
  [4]=>
  int(3)
  [5]=>
  int(2)
}

Reference: https://www.php.net/manual/en/ds-stack.construct.php

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