Ds\Stack::isEmpty

(PECL ds >= 1.0.0)

Ds\Stack::isEmpty — Returns whether the stack is empty

public function Ds\Stack::isEmpty(): bool

Returns whether the stack is empty.

This function has no parameters.

Returns true if the stack is empty, false otherwise.

Example #1 Ds\Stack::isEmpty() example

<?php
$a = new \Ds\Stack([1, 2, 3]);
$b = new \Ds\Stack();

var_dump($a->isEmpty());
var_dump($b->isEmpty());
?>

The above example will output something similar to:

bool(false)
bool(true)