//首先第一步是 获取access_token的代码 我这里呢 对token做了存表里的 因为token有限制
private function access_token(){
appid=shopappid;//复制的时候将appid写上你自己的apps=shop_appsecret;//复制的时候 将appsecret写上你自己的
wxuserdb=M('Wxuser′);//你可以去掉这里注意！！！wxuser=wxuserdb−>where(array('appid′=>appid))->find();
//得到access_token
if(wxuser[′atupdatetime′]==′′||intval(time())−intval(wxuser['atupdatetime'])>4000||$wxuser['access_token']=="“){
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$apps;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($ch);
    curl_close($ch);
    $jsoninfo = json_decode($output, true);
    $access_token = $jsoninfo["access_token"];
    $wxuser['access_token']=$access_token;
    $wxuser['atupdatetime']=time();
    $wxuserdb->where(array('appid'=>$appid))->save($wxuser);
  }else{
    $access_token = $wxuser['access_token'];
  }
  return $access_token;
}

private function get_res(url,data){
ch=curlinit();curlsetopt(ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt(ch,CURLOPTSSLVERIFYHOST,FALSE);curlsetopt(ch, CURLOPT_URL, url);curlsetopt(ch, CURLOPT_POSTFIELDS, data);curlsetopt(ch, CURLOPT_RETURNTRANSFER, true);
output=curlexec(ch);
curl_close(ch);jsoninfo = json_decode(output,true);returnjsoninfo;
}

/**
* productid get productinfo根据id获取商品信息
*/
private function get_product_info(){
wxtoken=this->access_token();//获取到token
productid=′pP3K2s25zDRY50n3nLCKqZvPzINM′;//商品idurl = "https://api.weixin.qq.com/merchant/get?access_token=".wxtoken;//这里是通过商品id查询商品信息的接口地址data='{ "product_id": "'.product_id.'"} ';
    echothis->get_res(url,data);//通过之前封装的 PHP curl()方法
exit;
}