Gulshan Guley

## binary_search_tree.php
<?php

class BinarySearchTree {
	private $_root;
	public function __construct() {
		// setup sentinal node
		$this->_root = new BinarySearchNode(null);
	}
	public function getRoot() {
		return $this->hasNode() ? $this->_root->right : null;
	<?php

	class BinarySearchTree {
	private $_root;
	public function __construct() {
	// setup sentinal node
	$this->_root = new BinarySearchNode(null);
	}
	public function getRoot() {
	return $this->hasNode() ? $this->_root->right : null;