一致性hash php

<?php
require_once 'flexihash.php';
error_reporting(0);
Class CiHashSvc
{

	public $hash = null;
	public $memcache = null;
	public $connectPool = null;

	public function __construct()
	{
		$this->hash = new Flexihash();
	}

	public function addServers( $servers )
	{
		foreach ($servers as $server)
		{
			$node = $server;
			$this->connectPool[$node] = false;
			$targets[] = $node;
		}
		$this->hash->addTargets( $targets );
	}

	public function set( $key, $value )
	{
		$nodes = $this->hash->lookupList( $key, count( $this->connectPool ) );
		foreach ($nodes as $node)
		{
			if (!$this->connectPool[$node])
			{
				$this->connectPool[$node] = $node;
			}
			if ($this->connectPool[$node])
			{
				echo "set key [$key] => value [$value] in node [$node]<br/>";
				return $node;
			}
		}
		return false;
	}

	public function get( $key )
	{
		$nodes = $this->hash->lookupList( $key, count( $this->connectPool ) );
		foreach ($nodes as $node)
		{
			if (!$this->connectPool[$node])
			{
				$this->connectPool[$node] = $node;
			}
			if ($this->connectPool[$node])
			{
				echo "get key [$key] in node [$node]<br/>";
				return $node;
			}
		}
		return false;
	}

}
$data = array();

//$config = array('1:1','2:2','3:3');
$config = array('2:2','3:3','4:4');
$beginTime = microtime(true);
$cls = new  CiHashSvc();
$cls->addServers($config);
for($i = 1;$i < 5000; $i++){
	$cls->set($i,$i);
	$idx = $cls->get($i);
	$data[$idx] += 1; 
}
$diff = -$beginTime + microtime(true);
echo "total time : [$diff]<br/>";
var_dump($data);