PHP | Ds\Stack pop() Function

The Ds\Stack::pop() function of PHP is used to remove the element present at the top of the Stack instance. This function also returns the top element of the stack after removing it.

Syntax:

mixed public Ds\Stack::pop ( void )

Parameters: This function does not accept any parameters.
Return Value mixed This function returns the element present at the top of the Stack and removes it from the stack.

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

Program 1:

PHP

<?php

// PHP program to illustrate the
// Ds\stack::pop() function

// Create a Stack instance
$stack = new \Ds\Stack();

// Pushing elements to Stack
$stack->push("Welcome");
$stack->push("to");
$stack->push("GfG");

// Print the initial Stack
print_r($stack);

// Print the top element and remove it
print_r($stack->pop());

// Print the Stack again
print_r($stack);

?>

Output:

Ds\Stack Object
(
    [0] => GfG
    [1] => to
    [2] => Welcome
)
GfG
Ds\Stack Object
(
    [0] => to
    [1] => Welcome
)

Program 2:

PHP

<?php

// PHP program to illustrate the
// Ds\stack::pop() function

// Create a Stack instance
$stack = new \Ds\Stack();

// Pushing Mixed value elements to Stack
$stack->push("Welcome");
$stack->push("to");
$stack->push("GfG");
$stack->push(10);
$stack->push(5.5);

// Print the Stack initially
print_r($stack);

// Print the top element and remove it
print_r($stack->pop());

// Print the stack again
print_r($stack);

?>

Output:

Ds\Stack Object
(
    [0] => 5.5
    [1] => 10
    [2] => GfG
    [3] => to
    [4] => Welcome
)
5.5
Ds\Stack Object
(
    [0] => 10
    [1] => GfG
    [2] => to
    [3] => Welcome
)

Reference: http://php.net/manual/en/ds-stack.pop.php