The **`Queue::isEmpty()` function** in PHP is used to check if a queue is empty. `Queue::isEmpty()` returns `true` (`1`) if the queue is empty. Otherwise, it returns `false`. 

The illustration below shows the visual representation of the `Queue::isEmpty()` function.


# 
## Syntax

```php
queue_name->isEmpty()
## where the queue_name is the name of the queue
```

## Parameter
The `Queue::isEmpty()` function does not require any parameters.

## Return value

The `Queue::isEmpty()` function returns `true` (`1`) if the queue is empty. Otherwise, it returns `false`.


## Code


<?php
$queue1 = new \Ds\Queue();
#sending the list of elements 
$queue->push(1,3,5,2,0);
echo("Queue1 is empty");
echo($queue1->isEmpty());
######output######
#Queue1 is empty : 
$queue2 = new \Ds\Queue();
echo("Queue2 is empty");
echo($queue2->isEmpty());
######output######
#Queue2 is empty: 1
?>	


What is Ds\Queue::isEmpty() in PHP?

The Queue::isEmpty() function in PHP checks if a queue is empty, returning true if it is and false otherwise.