(PECL ds >= 1.0.0)
Ds\Queue::isEmpty — Returns whether the queue is empty
public Ds\Queue::isEmpty ( ) : bool
Returns whether the queue is empty.
This function has no parameters.
Returns true if the queue is empty, false otherwise.
Example #1 Ds\Queue::isEmpty() example
<?php $a = new \Ds\Queue([1, 2, 3]); $b = new \Ds\Queue(); var_dump($a->isEmpty()); var_dump($b->isEmpty()); ?>
The above example will output something similar to:
bool(false) bool(true)
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/ds-queue.isempty.php