PHP微信开发之二维码生成类

<div class="jb51code">
<pre class="brush:PHP;">
<?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,1);
return DownLoadQr($url,time());
}
protected function getQrcodeurl($ACCESS_TOKEN,$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) {

$ch = curl_init();
curl_s<a href="https://www.jb51.cc/tag/eto/" target="_blank" class="keywords">eto</a>pt($ch,CURLOPT_POST,1);
curl_s<a href="https://www.jb51.cc/tag/eto/" target="_blank" class="keywords">eto</a>pt($ch,CURLOPT_URL,$url);
curl_s<a href="https://www.jb51.cc/tag/eto/" target="_blank" class="keywords">eto</a>pt($ch,CURLOPT_POSTFIELDS,$data_string);
curl_s<a href="https://www.jb51.cc/tag/eto/" target="_blank" class="keywords">eto</a>pt($ch,CURLOPT_HTTPHEADER,array(
    'Content-Type: application/json; charset=utf-8','Content-Length: ' . strlen($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");
}

}