PHP | Ds\Queue::peek() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP Ds\Queue::peek() Function.

The built-in PHP Ds\Queue::peek() function returns a value at the front of a queue.

Syntax

Following below is the syntax to use this function -

public mixed Ds\Queue::peek( void )

READ: PHP | Ds\Queue::count() Function

Parameter Details

This built-in PHP function does not have any parameter.

Return Value

This function returns a value at the front of a queue but doesn't remove it. This function can throw an UnderflowException if empty.

Example

Try out the following example below -

<?php  
   $queue = new \Ds\Queue();  
   $queue->push("Web");  
   $queue->push("Design"); 
   $queue->push("Tutorialz"); 
   $queue->push("Nigeria"); 
  
   echo "The queue is: \n"; 
   print_r($queue); 
  
   echo "\n The element at front is:"; 
   print_r($queue->peek()); 
?>

READ: PHP | Ds\Queue::jsonSerialize() Function

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP Ds\Queue::pop() Function.

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