PHP SplQueue::enqueue() Function

The SplQueue::enqueue() function is an inbuilt function in PHP which is used to add the element to the queue.

Syntax:

void SplQueue::enqueue( $val )

Parameters: This function accepts a single parameter $val which specifies the value for add (enqueue) element.

Return Value: This function does not return any value.

Below programs illustrate the SplQueue::enqueue() function in PHP:

Program 1:

<?php

// Create a new empty queue
$gfg = new SplQueue();

$gfg[] = 1;

// Enqueue element
$gfg->enqueue(10);
$gfg->enqueue(20);

echo $gfg[1] .  "\n";
echo $gfg[2] .  "\n";

?>

Output:

10
20

Program 2:

<?php

// Create some fixed size array
$gfg = new SplQueue();

$gfg[] = 1;
$gfg[] = 5;
$gfg[] = 1;
$gfg[] = 11;
$gfg[] = 15;
$gfg[] = 17;

$gfg->enqueue(11);
$gfg->enqueue(12);
$gfg->enqueue(13);
$gfg->enqueue(14);

// Print result after enqueue
foreach ($gfg as $elem)  {
    echo $elem."\n";
}
?>

Output:

1
5
1
11
15
17
11
12
13
14

Reference: https://www.php.net/manual/en/splqueue.enqueue.php