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 = "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('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");

}

}