WeChat development QR code generation class

This article mainly introduces the QR code generation class for PHP WeChat development. This article uses the WeChat interface to realize the generation of QR codes and directly gives sample codes. Friends in need can refer to it

<?php
/**
 * Created by PhpStorm.
 * User: bin
 * Date: 15-1-16
 * Time: 上午9:48
 */
namespace Home\Common;

// 微信处理类
set_time_limit(30);
class Weixin{
  //构造方法
  static $qrcode_url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?";
  static $token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&";
  static $qrcode_get_url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?";

  //生成二维码
  public function getEwm($wechatid,$fqid,$type = 1){
    $wechat = M(&#39;Member_public&#39;)->where(array(&#39;id&#39;=> $wechatid))->find();
    $appid = $wechat[&#39;appid&#39;];
    $secret = $wechat[&#39;secret&#39;];
    $ACCESS_TOKEN = $this->getToken($appid,$secret);
    $url = $this->getQrcodeurl($ACCESS_TOKEN,$fqid,1);
    return DownLoadQr($url,time());
  }
  protected function getQrcodeurl($ACCESS_TOKEN,$fqid,$type = 1){
    $url = self::$qrcode_url.&#39;access_token=&#39;.$ACCESS_TOKEN;
    if($type == 1){
      //生成永久二维码
      $qrcode= &#39;{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_id": &#39;.$fqid.&#39;}}}&#39;;
    }else{
      //生成临时二维码
      $qrcode = &#39;{"expire_seconds": 1800, "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": &#39;.$fqid.&#39;}}}&#39;;
    }
    $result = $this->http_post_data($url,$qrcode);
    $oo = json_decode($result[1]);
    if(!$oo->ticket){
      $this->ErrorLogger(&#39;getQrcodeurl falied. Error Info: getQrcodeurl get failed&#39;);
      exit();
    }
    $url = self::$qrcode_get_url.&#39;ticket=&#39;.$oo->ticket.&#39;&#39;;
    return $url;

  }

  protected function getToken($appid,$secret){
    $ACCESS_TOKEN = file_get_contents(self::$token_url."appid=$appid&secret=$secret");
    $ACCESS_TOKEN = json_decode($ACCESS_TOKEN);
    $ACCESS_TOKEN = $ACCESS_TOKEN->access_token;
    return $ACCESS_TOKEN;
  }
  protected function http_post_data($url, $data_string) {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        &#39;Content-Type: application/json; charset=utf-8&#39;,
        &#39;Content-Length: &#39; . strlen($data_string))
    );
    ob_start();
    curl_exec($ch);
    if (curl_errno($ch)) {
      $this->ErrorLogger(&#39;curl falied. Error Info: &#39;.curl_error($ch));
    }
    $return_content = ob_get_contents();
    ob_end_clean();
    $return_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    return array($return_code, $return_content);
  }
  //下载二维码到服务器
  protected function DownLoadQr($url,$filestring){
    if($url == ""){
      return false;
    }
    $filename = $filestring.&#39;.jpg&#39;;
    ob_start();
    readfile($url);
    $img=ob_get_contents();
    ob_end_clean();
    $size=strlen($img);
    $fp2=fopen(&#39;./Uploads/qrcode/&#39;.$filename,"a");
    if(fwrite($fp2,$img) === false){
      $this->ErrorLogger(&#39;dolwload image falied. Error Info: 无法写入图片&#39;);
      exit();
    }
    fclose($fp2);
    return &#39;./Uploads/qrcode/&#39;.$filename;
  }

  private function ErrorLogger($errMsg){
    $logger = fopen(&#39;./ErrorLog.txt&#39;, &#39;a+&#39;);
    fwrite($logger, date(&#39;Y-m-d H:i:s&#39;)." Error Info : ".$errMsg."\r\n");
  }

}

The above is the detailed content of WeChat development QR code generation class. For more information, please follow other related articles on the PHP Chinese website!