insert node at beginning of circular linked list in php

Php program for insert node at beginning of circular linked list. Here problem description and explanation.

<?php
// Php Program 
// Insert node at beginning of circular linked list

// Define class of linked list Node
class LinkNode
{
	public $data;
	public $next;
	public	function __construct($data, $first)
	{
		$this->data = $data;
		$this->next = $first;
	}
}
class CircularLinkedList
{
	public $head;
	// Class constructors
	function __construct()
	{
		$this->head = NULL;
	}
	// Insert node at begining of circular linked list
	public	function insert($value)
	{
		// Create a node
		$node = new LinkNode($value, $this->head);
		if ($this->head == NULL)
		{
			// First node of linked list
			$this->head = $node;
			$node->next = $this->head;
		}
		else
		{
			$temp = $this->head;
			// Find the last node
			while ($temp->next != $this->head)
			{
				// Visit to next node
				$temp = $temp->next;
			}
			// Add node
			$temp->next = $node;
			// make new head node
			$this->head = $node;
		}
	}
	// Display node element of circular linked list
	public	function display()
	{
		if ($this->head == NULL)
		{
			printf("Empty Linked List\n");
		}
		else
		{
			printf("  Linked List Element : \n");
			// Get first node
			$temp = $this->head;
			// iterate linked list
			while ($temp != NULL)
			{
				// Display node
				printf("  %d ",$temp->data);
				// Visit to next node
				$temp = $temp->next;
				if ($temp == $this->head)
				{
					// Stop iteration
					return;
				}
			}
		}
	}
	public static
	function main($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


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