微信投票

微信投票：（设计网页，网页授权获取access_token，设计投票方式）

第一步：先要网页授权获取code：在IndexController.class.php中：

<?php namespace Home\Controller; use Think\Controller; class IndexController extends Controller { public function index(){ $appid='wx8de5dc1fbeac393c'; $redirect_uri = urlencode('http://yuanyue.top/vote/index.php/home/index/validUser'); $url="https://open.weixin.qq.com/connect/oauth2/authorize?appid=$appid&redirect_uri=$redirect_uri&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect"; header('Location:' . $url); }

第二步：通过code换取网页授权获取access_token并拉取用户信息：

public function validUser(){ $code=$_GET["code"]; // echo $code; $json = $this->access_token($code); $arr = json_decode($json,true);//json->array $arr = array_change_key_case($arr,CASE_LOWER);//将数组中的键转化为小写 if(isset($arr['access_token']) && isset($arr['openid'])){ $this->getUserInfo($arr['access_token'],$arr['openid']); }else{ echo '获取access_token出错'.$json; } } private function access_token($code){ $appid = "wx8de5dc1fbeac393c"; $appsecret = "878c4252f00904a06fbc78b75b96b057"; $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=$appid&secret=$appsecret&code=$code&grant_type=authorization_code"; // return $url; $ret = https_request($url); return $ret; }第三步：拉取用户信息（利用openid）： private function getUserInfo($access_token,$openid){ $url = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=$openid"; $json = https_request($url); // echo $json; $userinfo_array = json_decode($json,true); $userinfo = array_change_key_case($userinfo_array,CASE_LOWER); $fans = M('fans'); $data = $fans->where("openid='{$userinfo['openid']}'")->find(); if(empty($data)){ $ret = $fans->add($userinfo); if($ret){ $this->display('Vote/index'); }else{ echo 'error'; } }else{ $this->display('Vote/index'); } }

第四步：保存投票信息，并添加到数据库中：在VoteController.class.php：

<?php namespace Home\Controller; use Think\Controller; class VoteController extends Controller{ public function index(){ $this->display(); } public function vote(){ $data = M('group')->select(); // print_r($data); // exit; $this->assign('data',$data); $this->display(); } public function save_vote($groupid){ $openid = "oJUeY1Ul_RKOkh3cGzkZB8lbxgBc"; $where['openid'] = $openid; $where['groupid'] = $groupid; $data = M('vote')->where($where)->find(); if(empty($data)){ M('vote')->add(array('openid'=>$openid,'groupid'=>$groupid,'vote_time'=>time())); $this->ajaxReturn(array('errcode'=>0,'msg'=>'投票成功，谢谢参与')); }else{ $this->ajaxReturn(array('errcode'=>1,'msg'=>'您已经投过票，每个队只能投一次')); } }

第五步：写投票方式，分为4种不同的条件：

private function buildwhere($type,$openid,$groupid){ //查询条件 $where = array(); $y = date("Y"); $m = date("m"); $d = date("d"); //将今天开始的年月日时分秒，转换成unix时间戳(开始示例：2015-10-10 00:00:00) $todayStart = mktime(0,0,0,$m,$d,$y); $todayEnd = mktime(23,59,59,$m,$d,$y); switch ($type) { case 1: //每队仅能投一次. $where['openid'] = $openid; $where['groupid'] = $groupid; break; case 2: //仅能投一次 $where['openid'] = $openid; break; case 3: //给每个队一天仅能投一次 $where['openid'] = $openid; $where['groupid'] = $groupid; $where['vote_time'] = array('between',"$todayStart,$todayEnd"); break; case 4: //每天仅能投一次. $where['openid'] = $openid; $where['vote_time'] = array('between',"$todayStart,$todayEnd"); break; default: break; } return $where; } } ?>