微信上传客服消息图片

public function uploadWXImg($imgpath, $id){
	$mp_infoModel = M('Game');
	$mp_info = $mp_infoModel->find($id);
	$TOKEN=$this->get_access_token($mp_info['app_id'], $mp_info['app_secret']);
	$URL ='https://api.weixin.qq.com/cgi-bin/media/upload?access_token='.$TOKEN.'&type=image';
	$data = ['media'=>'@'.$imgpath];
	$result = $this->curl_post($URL,$data);
	$data = @json_decode($result,true);
	return $data['media_id'];
}
/**
 * 获取token
 * @param string $appId
 * @param string $appSecret
 * @return mixed
 */
public function get_access_token($appId = '', $appSecret = ''){
	$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appId&secret=$appSecret";
	$result = file_get_contents($url);
	$result = json_decode($result,true);
	$accesstoken = $result['access_token'];
	return $accesstoken;
}

public function curl_post($url, $data = null)
{
	$curl=curl_init();
	curl_setopt ( $curl, CURLOPT_SAFE_UPLOAD, FALSE); 
	curl_setopt($curl, CURLOPT_URL, $url);
	curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
	curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
	if(!empty($data)){
	    curl_setopt($curl, CURLOPT_POST, 1);
		$hadFile=false;
		if (is_array($data) && isset($data['media'])) {
			/* 支持文件上传 */
			if (class_exists('\CURLFile')){
				curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
				foreach ($data as $key => $value) {
					if ($this->isPostHasFile($value)) {
						$postfields[$key] = new \CURLFile(realpath(ltrim($value, '@')));
						$hadFile = true;
					}
				}
			}elseif (defined('CURLOPT_SAFE_UPLOAD')) {
				if ($this->isPostHasFile($value)) {
					curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
					$hadFile = true;
				}
			}
		}
		$tmpdatastr = (!$hadFile && is_array($postfields)) ? http_build_query($postfields) : $postfields;
		curl_setopt($curl, CURLOPT_POSTFIELDS, $tmpdatastr);
	}
	curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
	$output=curl_exec($curl);
	curl_close($curl);
	return $output;
}
public function isPostHasFile($value)
{
	if (is_string($value) && strpos($value, '@') === 0 && is_file(realpath(ltrim($value, '@')))) {
		return true;
	}
	return false;
}