微信二維碼生成(微信二維碼生成器小程序)

后端PHP動態生成指定路由和參數的小程序二維碼

目的：手機端識別二維碼后直接打開并跳轉到小程序的指定頁面

//返回二維碼ba64編碼或者本地圖片路徑function getQrcode(){ $access_token = $this->getAccessToken(); //構建請求二維碼參數 //path是掃描二維碼跳轉的小程序路徑，可以帶參數?id=xxx //width是二維碼寬度 $qcode ="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$access_token"; //pages/index/index為自定義的小程序端的路由 $param = json_encode(array("path"=>"pages/index/index?tjr_id={$tjr_uid}","width"=> 150)); //POST參數 $result = $this->httpRequest( $qcode, $param,"POST"); //生成二維碼(將圖片保存到本地) file_put_contents("qrcode.png", $result); //返回ba64編碼格式的圖片 $ba64_image ="data:image/jpeg;ba64,".ba64_encode( $result ); return $ba64_image; } //根據appid和appcret獲取access_token function getAccessToken() { //可以從配置文件里面讀取 $appid = '小程序的appid'; $appcret = '小程序的appcret';// header('content-type:text/html;chart=utf-8'); //獲取access_token $access_token = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&cret=$appcret"; $json = $this->httpRequest($access_token); $json = json_decode($json, true); return $json["access_token"]; } //把請求發送到微信服務器換取二維碼 function httpRequest($url, $data='', $method='GET'){ $curl = curl_init(); curl_topt($curl, CURLOPT_URL, $url); curl_topt($curl, CURLOPT_SSL_VERIFYPEER, 0); curl_topt($curl, CURLOPT_SSL_VERIFYHOST, 0); curl_topt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); curl_topt($curl, CURLOPT_FOLLOWLOCATION, 1); curl_topt($curl, CURLOPT_AUTOREFERER, 1); if($method=='POST') { curl_topt($curl, CURLOPT_POST, 1); if ($data != '') { curl_topt($curl, CURLOPT_POSTFIELDS, $data); } } curl_topt($curl, CURLOPT_TIMEOUT, 30); curl_topt($curl, CURLOPT_HEADER, 0); curl_topt($curl, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($curl); curl_clo($curl); return $result; }