PHP微信开发之二维码生成类


            



<?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 = "http://api.weixin.qq.com/cgi-bin/qrcode/create?";

  static $token_url = "http://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&";

  static $qrcode_get_url = "http://mp.weixin.qq.com/cgi-bin/showqrcode?";



  //生成二维码

  public function getEwm($wechatid,$fqid,$type = 1){

    $wechat = M('Member_public')->where(array('id'=> $wechatid))->find();

    $appid = $wechat['appid'];

    $secret = $wechat['secret'];

    $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.'access_token='.$ACCESS_TOKEN;

    if($type == 1){

      //生成永久二维码

      $qrcode= '{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_id": '.$fqid.'}}}';

    }else{

      //生成临时二维码

      $qrcode = '{"expire_seconds": 1800, "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": '.$fqid.'}}}';

    }

    $result = $this->http_post_data($url,$qrcode);

    $oo = json_decode($result[1]);

    if(!$oo->ticket){

      $this->ErrorLogger('getQrcodeurl falied. Error Info: getQrcodeurl get failed');

      exit();

    }

    $url = self::$qrcode_get_url.'ticket='.$oo->ticket.'';

    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(

        'Content-Type: application/json; charset=utf-8',

        'Content-Length: ' . strlen($data_string))

    );

    ob_start();

    curl_exec($ch);

    if (curl_errno($ch)) {

      $this->ErrorLogger('curl falied. Error Info: '.curl_error($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.'.jpg';

    ob_start();

    readfile($url);

    $img=ob_get_contents();

    ob_end_clean();

    $size=strlen($img);

    $fp2=fopen('./Uploads/qrcode/'.$filename,"a");

    if(fwrite($fp2,$img) === false){

      $this->ErrorLogger('dolwload image falied. Error Info: 无法写入图片');

      exit();

    }

    fclose($fp2);

    return './Uploads/qrcode/'.$filename;

  }



  private function ErrorLogger($errMsg){

    $logger = fopen('./ErrorLog.txt', 'a+');

    fwrite($logger, date('Y-m-d H:i:s')." Error Info : ".$errMsg."\r\n");

  }



}