简单实现淘宝API调用

<?php
 
class TaobaoApi {
    /*
     * 定义并初始化参数数组，某些固定参数可写在这个位置
     */
 
    protected $_param = array('app_key' => '21572060', 'v' => '2.0',
        'sign_method' => 'md5', 'format' => 'xml');
    /*
     * Sign值存储变量
     */
    protected $_sign;
    /*
     * 应用密码存储变量
     */
    public $secret = 'your secret';
    /*
     * 请求URL存储变量
     */
    protected $_url;
 
    public function run() {
        $this->createSign();
        $this->createRequestUrl();
        return $this->requestData();
    }
 
    /*
     * 通过魔法赋值向参数数组写入数据
     * @param string $name 数组名
     * @param string $value 数组键值
     */
 
    public function __set($name, $value) {
        $this->_param[$name] = $value;
    }
 
    /*
     * 组建Sign
     * @global $this->_param 参数数组
     * @global $this->secret 应用密钥
     */
 
    protected function createSign() {
        $this->_param['timestamp'] = date('Y-m-d H:i:s');
        ksort($this->_param, SORT_STRING); //数组按键值排序
        $tmp = '';
        foreach ($this->_param as $key => $value) {
            $tmp.= $key . $value;
        }
        $this->_sign = strtoupper(md5($this->secret . $tmp . $this->secret));
    }
 
    /*
     * 由参数和Sign值组合成请求URL
     * @global $this->_param
     * @global $this->url
     */
 
    protected function createRequestUrl() {
        $this->_param['timestamp'] = urlencode($this->_param['timestamp']);
        $this->_url = 'http://gw.api.taobao.com/router/rest?sign=' . $this->_sign;
        foreach ($this->_param as $key => $value) {
            $this->_url.='&' . $key . '=' . $value;
        }
    }
 
    /*
     * 获取数据
     */
 
    protected function requestData() {
        return file_get_contents($this->_url);
    }
 
}
 
$a = new TaobaoApi();
//下面只要写入淘宝API规定必须传入的参数
$a->method = 'taobao.item.get';
$a->fields = 'desc,nick';
$a->app_key = 'your key';
$a->secret = 'your secret';
$a->num_iid = 16096610668;
//默认以xml方式输出
echo $a->run();
?>