利用微信公共号的带参数二维码做（扫码登录）

参数二维码做（扫码登录）"/>

利用微信公共号的带参数二维码做（扫码登录）

<script type="text/javascript">var t2 ='';$(function() {var rand = parseInt(Math.random() * (999999999 - 10000000 + 1) + 10000000);   //生成随机数做为二维码的参数 （用来判断扫码的用户）//生成二维码$.post(".php/mobile/KF/buildQrcode",{str:rand},function(result){console.log(result);var obj = JSON.parse(result);var sign = obj.scene_str;var src = ""+obj.src;$('#wxewm').attr('src',src);$('input[name=sign]').val(sign);});//轮询扫码后的登录t2 = window.setInterval("login()",1000);//使用字符串执行方法 //window.clearTimeout(t1);//去掉定时器 setTimeout("end()",30000);})function end(){  //如果超过一定时间不扫码，停止轮询，提示过期$('#wxewm').hide();   //隐藏二维码window.clearTimeout(t2);    //停止轮询$('#notice').show();  //提示二维码过期 }function login(){   //不停发送请求，获取扫码人的信息，如果扫码了获取信息停止轮询，var code =$('input[name=sign]').val();$.post(".php/mobile/KF/pass",{str:code},function(result){console.log(result);var obj = JSON.parse(result);var user_name = obj.user_name;var pass = obj.pass;if(pass){window.clearTimeout(t2);window.location.href=""; //跳转到登录后的页面}});}</script>

后端

php用file_get_contents(“php://input”)或者$HTTP_RAW_POST_DATA可以接收xml数据

public function get_ACCESS_TOKEN() //获取token
{
$appid= ‘wx8feca7bba41accc4’;

    $secret='beca81f0da48dc92f9610dc21648fec6';$data = json_decode(file_get_contents("=client_credential&appid=$appid&secret=$secret")) ;return $data->access_token;
}
public function buildQrcode()    //生成带参数二维码
{  $str = $_POST['str'];$access_token=$this->get_ACCESS_TOKEN();// scene_id 参数$data = '{  "expire_seconds": 604800,  "action_name": "QR_SCENE",  "action_info": {  "scene": {  "scene_id":'.$str.'}  }  }';  $url = "=".$access_token;$obj = json_decode(httpRequest($url, 'POST', $data));$ticket=$obj->ticket;return json_encode(['src'=>"?ticket=$ticket",'scene_str'=>$str]);
}
public function kf_login()    //扫码客服
{//$GLOBALS["HTTP_RAW_POST_DATA"];  //这个用不了了；换成下面那个$postStr = file_get_contents("php://input");$postObj = json_decode(json_encode(simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA)),true);$openid = $postObj['FromUserName'];$EventKey = $postObj['EventKey'];$user=M('sms_log')->field('id')->where(['openid'=>$openid])->find();if(!$user['id']){$id = M('sms_log')->add(['openid'=>$openid]);$Login=new Login();$pass=$Login->get_sign('kf'.$id);M('sms_log')->where(['id'=>$id])->save(['pass'=>$pass,'code'=>$EventKey]);}else{M('sms_log')->where(['id'=>$user['id']])->save(['code'=>$EventKey]);}
}public function pass(){  //登录$str = $_POST['str'];$user=M('sms_log')->field('id,pass')->where(['code'=>$str])->find();M('sms_log')->where(['code'=>$str])->save(['code'=>'']);  //每次登录后清空参数，避免出现重复return json_encode(['user_name'=>'kf'.$user['id'],'pass'=>$user['pass']]);
}