微信获取ticket及生成二维码（临时或永久）
curl.php----
define("APPID","");
define("APPSECRET","");
define("TOKEN","weixin");
require("./wechat.inc.php");
header("content-type:image/jpg");
$wechat=new WeChat(APPID,APPSECRET,TOKEN);
echo $wechat->_getQRCode();
wechat.inc.php------
class WeChat{
private $_appid;
private $_appsecret;
private $_token;
public function __construct($appid,$appsecret,$token)
{
$this->_appid=$appid;
$this->_appsecret=$appsecret;
$this->_token=$token;
}
private function _request($curl,$https=true,$method='get',$data=null)
{
$ch=curl_init(); //初始化
curl_setopt($ch,CURLOPT_URL,$curl);
curl_setopt($ch,CURLOPT_HEADER,false);//设置不需要头信息
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);//获取页面内容，但不输出
if($https)
{
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);//不做服务器认证
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);//不做客户端认证
}
if($method=='post')
{
curl_setopt($ch, CURLOPT_POST,true);//设置请求是post方式
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);//设置post请求数据
}
$str=curl_exec($ch);//执行访问
curl_close($ch);//关闭curl，释放资源
return $str;
}
private function _getAccesstoken()
{
$file="./accesstoken";
if(file_exists($file))
{
$content=file_get_contents($file);
$content=json_decode($content);
if(time()-filemtime($file)<$content->expires_in)
{
return $content->access_token;
}
}
$content=_request("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$this->_appid."&secret=".$this->_appsecret);
file_put_contents($file,$content);
$content=json_decode($content);
return $content->access_token;
}
/*获取ticket
expire_seconds:二维码有效期（秒）
type：二维码类型（临时或永久）
scene:场景编号
*/
public function _getTicket($expire_seconds=604800,$type="temp",$scene=1)
{
if($type=="temp"){
$data='{"expire_seconds": '.$expire_seconds.', "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": '.$scene.'}}}';
return $this->_request("https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=".$this->_getAccesstoken(),true,"post",$data);
}else
{
$data='{"action_name": "QR_LIMIT_SCENE", "action_info": {"scene": {"scene_id": '.$scene.'}}}';
return $this->_request("https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=".$this->_getAccesstoken(),true,"post",$data);
}
}
/* 通过ticket获取二维码 */
public function _getQRCode($expire_seconds=604800,$type="temp",$scene=1)
{
$content=json_decode($this->_getTicket($expire_seconds,$type,$scene));
$ticket=$content->ticket;
$image=$this->_request("https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=".urlencode($ticket));
//$file="./".$type.$scene.".jpg"; //设置图片名字
//file_put_contents($file,$content); //二维码保存到本地
return $image;
}
}