Effectively insert node at beginning of circular linked list in php

Php program for Effectively insert node at beginning of circular linked list . Here more information.

<?php
// Php Program 
// Insert node at beginning of circular linked list
// Using head and tail nodes

// Define class of linked list Node
class LinkNode
{
	public $data;
	public $next;
	public	function __construct($data, $first)
	{
		// Set node value
		$this->data = $data;
		$this->next = $first;
	}
}
class CircularLinkedList
{
	public $head;
	public $tail;

	function __construct()
	{
		$this->head = NULL;
		$this->tail = NULL;
	}
	// Insert node at begining of circular linked list
	public	function insert($value)
	{
		// Create a node
		$node = new LinkNode($value, $this->head);
		if ($this->tail == NULL)
		{
			// First node of linked list
			$this->tail = $node;
		}
		// Make new head
		$this->head = $node;
		// Connecting the last node to the top of the next field
		$this->tail->next = $this->head;
	}
	// Display node element of circular linked list
	public	function display()
	{
		if ($this->head == NULL)
		{
			printf("Empty Linked List\n");
		}
		else
		{
			printf("Linked List Element : ");
			$temp = $this->head;
			// iterate linked list
			while ($temp != NULL)
			{
				// Display node
				printf("%d  ",$temp->data);
				if ($temp == $this->tail)
				{
					// Stop iteration
					// Or break;
					return;
				}
				// Visit to next node
				$temp = $temp->next;
			}
		}
	}
	public static
	function main($args)
	{
		$task = new CircularLinkedList();
		// Add following linked list nodes
		$task->insert(8);
		$task->insert(7);
		$task->insert(6);
		$task->insert(5);
		$task->insert(4);
		$task->insert(3);
		$task->insert(2);
		$task->insert(1);
		// Display node
		$task->display();
	}
}

CircularLinkedList::main(array());

Output

Linked List Element : 1  2  3  4  5  6  7  8