PHP SplQueue::enqueue() Function

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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"; 
} 
?> 