淘宝api

<?php
class HelloTop
{
	static private $instance = null;
	static public function instance()
	{
		if (static::$instance === null)
			static::$instance = new static;
		return static::$instance;
	}
	//不分析错误直接获取数据...
	static function factory(array $arr)
	{
		$top = static::instance();
		return $top->exec($arr)->analyze();
	}
	
	private $appSecret, $appKey, $url, $paramArr, $jsonData;
	protected function __construct()
	{
		$this->appKey = 'top.app.key';
		$this->appSecret = 'top.app.secret';
		$this->url = false ? 'http://gw.api.tbsandbox.com/router/rest'
			: 'http://gw.api.taobao.com/router/rest';
		$this->paramArr = array(
			'app_key' => $this->appKey,
			'format' => 'json',
			'v' => '2.0',
			'sign_method'=>'md5',
			'timestamp' => date('Y-m-d H:i:s')
		);
	}
	//单例重置
	private function reset()
	{
		$this->errno = 0;
		$this->errmsg= null;
		$this->jsonData = null;
	}
	//执行
	public function exec(array $arr)
	{
		$this->reset();
		if (!array_key_exists('method', $arr) || !$arr['method'])
			throw new Exception('没有方法？？');
		$paramArr = array_merge($this->paramArr, $arr);
		
		$sign = $this->createSign($paramArr);
		$strParam = http_build_query($paramArr) . '&sign=' . $sign;
		
		$url = $this->url . '?' . $strParam;
		$ctx = stream_context_create(array(
		   'http' => array(
			   'timeout' => 5 //设置一个超时时间，单位为秒
			   )
		   )
		);
		$result = file_get_contents($url, 0, $ctx);
		$json = json_decode(preg_replace("/[\r\n]/", '', $result), true); //desc的数据有问题
		$this->jsonData = array_key_exists('rsp', $json) ? $json['rsp'] : $json;
		return $this;
	}
	
	//获取json数据
	public function data()
	{
		return $this->jsonData;
	}
	
	private $errno, $errmsg;
	//分析数据，错误返回false，自行使用 errmsg 方法获取错误提示
	public function analyze()
	{
		if (array_key_exists('error_response', $this->jsonData)){
			$this->errno = $this->jsonData['error_response']['code'];
			$this->errmsg= $this->jsonData['error_response']['sub_msg'];
			return false;
		}else{
			return $this->data();
		}
	}
	public function errmsg()
	{
		return $this->errmsg;
	}
	
	//签名函数
	protected function createSign ($paramArr) {
		$sign = $this->appSecret;
		ksort($paramArr);
		foreach ($paramArr as $key => $val)
			if ($key != '' && $val != '') {
				$sign .= $key.$val;
			}
		$sign .= $this->appSecret;
		$sign  = strtoupper(md5($sign));
		return $sign;
	}
}