<?php
/**
 * Created by PhpStorm.
 * User: zhoujianhui
 * Date: 2018/9/17
 * Time: 下午4:30
 */
//獲取token
header('content-type:text/html;charset=utf-8');
include ("db.php");
//配置APPID、APPSECRET
$APPID = $_POST['appid'];
$APPSECRET =  $_POST['appsecret'];
$name = $_POST['name'];
$uid = (int)$_COOKIE['id'];

$picname = $APPID.$name;

//獲取access_token
$access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$APPID&secret=$APPSECRET";

//快取access_token
session_start();
$_SESSION['access_token1'] = "";
$_SESSION['expires_in1'] = 0;

$ACCESS_TOKEN = "";
if(!isset($_SESSION['access_token1']) || (isset($_SESSION['expires_in1']) && time() > $_SESSION['expires_in1']))
{

    $json = httpRequest( $access_token );
    $json = json_decode($json,true);
    $_SESSION['access_token1'] = $json['access_token'];
    $_SESSION['expires_in1'] = time()+7200;
    $ACCESS_TOKEN = $json["access_token"];
}
else{

    $ACCESS_TOKEN =  $_SESSION["access_token1"];
}

//構建請求二維碼引數
//path是掃描二維碼跳轉的小程式路徑，可以帶引數?id=xxx
//width是二維碼寬度
$qcode ="https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=".$ACCESS_TOKEN;
$param = "{\"action_name\": \"QR_LIMIT_STR_SCENE\", \"action_info\": {\"scene\": {\"scene_str\": \"test\"}}}";
$result = httpRequest( $qcode, $param,"POST");
$result = json_decode($result,true);
$ticket = $result['ticket'];
$url1 = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".$ticket;
$res = httpRequest($url1);

//生成二維碼
file_put_contents("$picname.png", $res);
$base64_image ="data:image/jpeg;base64,".base64_encode($res);
$data1 = array('picname'=>$picname.".png");


//把請求傳送到微信伺服器換取二維碼
function httpRequest($url, $data='', $method='GET'){
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
    if($method=='POST')
    {
        curl_setopt($curl, CURLOPT_POST, 1);
        if ($data != '')
        {
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
    }

    curl_setopt($curl, CURLOPT_TIMEOUT, 30);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
}
 

//注意公眾號需要後臺加入白名單