一、前言
1、官方開發文檔：https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/qr-code.html
2、項目要上線才可以生成哦
二、生成二維碼方法（Tp5.0版）
//生成企業二維碼
public function createCompanyEwm(){
$post =input();
if(!isset($post['id'])||empty($post['token'])){
$param = array(
'code' => 0,
'msg' =>'參數錯誤!',
);
return json($param);
}
$peizhi = [];
//獲取配置
$peizhi['appid']=Db::name('config')->where(['name'=>'appid'])->value('value');
$peizhi['appsecret']=Db::name('config')->where(['name'=>'appsercet'])->value('value');
$peizhi['qn_domain']=Db::name('config')->where(['name'=>'qn_domain'])->value('value');
$token_content=file_get_contents("common_token.txt");//用於存儲access_token
if($token_content==''){//獲取新的access_token
$token_result=$this ->get_new_token($peizhi);
$res= $token_result['res'];
$new = $token_result['new'];
//判斷失敗
if(!$new['access_token']){
$param = array(
'code' => 0,
'msg' =>'獲取token失敗!',
'new'=>$new
);
return json($param);
}
$access_token=$new['access_token'];
//更新token緩存
$maxTime=time()+intval($new['expires_in']);
$access_arr=str_replace('}', ",\"maxTime\":".$maxTime."}", $res);
file_put_contents("common_token.txt",$access_arr);
}else{
$token_arr=json_decode($token_content,true);
if(intval($token_arr['maxTime'])<time()){
$token_result=$this ->get_new_token($peizhi);
$res= $token_result['res'];
$new = $token_result['new'];
if(!$new['access_token']){
$param = array(
'code' => 0,
'msg' =>'獲取token失敗!',
'errcode'=>$new['errcode']
);
return json($param);
}
$access_token=$new['access_token'];
$maxTime=time()+intval($new['expires_in']);
$access_arr=str_replace('}', ",\"maxTime\":".$maxTime."}", $res);
file_put_contents("common_token.txt",$access_arr);
}else{
$access_token=$token_arr['access_token'];
}
}
if($access_token==''||strlen($access_token)<10){
$param = array(
'code' => 0,
'msg' =>'獲取token失敗!',
);
return json($param);
}
$url="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$access_token;
$data=array(
'scene'=>intval($post['id']).','.trim($post['token']),
'page'=>'pages/details/details',
'width'=>430,
'auto_color'=>true,
'is_hyaline'=>false
);
//header("Content-type: image/jpg");
$ewm_res= $this->api_notice_increment($url,json_encode($data));
$dejson_ewm_res=json_decode($ewm_res,1);
if($dejson_ewm_res['errcode']==41030){
$param = array(
'code' => 0,
'msg' =>'所傳page頁面不存在，或者小程序沒有發布',
'dejson_ewm_res'=>$dejson_ewm_res
);
return json($param);
}
if($dejson_ewm_res['errcode']==45009){
$param = array(
'code' => 0,
'msg' =>'調用分鍾頻率受限(目前5000次/分鍾，會調整)，如需大量小程序碼，建議預生成。',
'dejson_ewm_res'=>$dejson_ewm_res
);
return json($param);
}
if($dejson_ewm_res['errcode']==40001){//token無效
$token_result=$this ->get_new_token($peizhi);
$res= $token_result['res'];
$new = $token_result['new'];
$access_token=$new['access_token'];
$maxTime=time()+intval($new['expires_in']);
$access_arr=str_replace('}', ",\"maxTime\":".$maxTime."}", $res);
file_put_contents("common_token.txt",$access_arr);
$url="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$access_token;
//header("Content-type: image/jpg");
$ewm_res= $this->api_notice_increment($url,json_encode($data));
}
$img=$this->change_picture($ewm_res);
$base64_img=$this->base64EncodeImage($img);
$this->delDirAndFile('./public/uploads/temporary/');
error_reporting(0);
//上傳到七牛
$Qiniu=new Qiniu();
$data=json_decode($Qiniu->liuUpload($base64_img),true);
$data['url']='http://'.$peizhi['qn_domain'].'/'.$data['hash'];
$file_exists=file_exists_get($data['url']);
if(!$file_exists){
return json(['code'=>0,'msg'=>'生成失敗！']);
}
//數據存入數據庫
$companyObj = new CompanyModel();
$flag = $companyObj->editCompany(['id'=>$post['id'],'ewm'=>$data['url'],'addtime'=>time()]);
$param = array(
'code' => 1,
'msg' =>'獲取成功',
'data'=>$data,
);
return json($param);
}
//獲取新的token
function get_new_token($peizhi){
$url="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$peizhi['appid']."&secret=".$peizhi['appsecret'];
$res= httpRequest($url);
$new = json_decode($res,1);
$result=array('res'=>$res,'new'=>$new);
return $result;
}
//網絡requst
function httpRequest($url,$data = null){
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
if (!empty($data)){
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
//執行
$output = curl_exec($curl);
curl_close($curl);
return $output;
}
/**
* 網絡請求-用於獲取二維碼函數
* @param [type] $url [description]
* @param [type] $data [description]
* @return [type] [description]
*/
function api_notice_increment($url, $data){
$ch = curl_init();
$header = ["Content-type: image/jpg"];
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$tmpInfo = curl_exec($ch);
curl_close($ch);
return $tmpInfo;
}
//二進制二維碼圖片buffer，保存為臨時圖片
public function change_picture($imgs){
$path="./public/uploads/temporary/";
if(!is_dir($path)){
mkdir($path);
}
$new_file = "./public/uploads/temporary/" .'ewm'.date('Y-m-d',time()).getRandomString(8).".jpg"; //生成圖片的名字
if(!empty($imgs)){
$file = fopen($new_file,"w");//打開文件准備寫入
fwrite($file,$imgs);//寫入
fclose($file);//關閉
}
return $new_file;
}
3、小程序獲取參數
Page({
onLoad(query) {
// scene 需要使用 decodeURIComponent 才能獲取到生成二維碼時傳入的 scene
const scene = decodeURIComponent(query.scene)
}
})