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
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