PHP | Ds\Stack count() Function

The Ds\Stack::count() function is an inbuilt function in PHP which is used to count the number of elements present in the Stack.

Syntax:

int Ds\Stack::count( void )

Parameters: This function does not accept any parameter.

Return Value: This function returns the number of elements present in the Stack.

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

Program 1:

<?php

// Declare new stack
$stack = new \Ds\Stack([10, 15, 21]);

// Display the stack element
var_dump($stack);

// Count number of elements
// present in the stack
echo "Number of elements present in the stack: ";
print_r($stack->count());

?>

Output:

object(Ds\Stack)#1 (3) {
  [0]=>
  int(21)
  [1]=>
  int(15)
  [2]=>
  int(10)
}
Number of elements present in the stack: 3

Program 2:

<?php

// Declare new stack
$stack = new \Ds\Stack(["Geeks", "for", "Keegs"]);

// Display the stack element
print_r($stack);

// Display count of elements
// present in the stack
echo "Number of elements present in the stack: ";
var_dump($stack->count());

?>

Output:

Ds\Stack Object
(
    [0] => Keegs
    [1] => for
    [2] => Geeks
)
Number of elements present in the stack: int(3)

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