由於PHP版本的問題 在公眾號開發過程中上傳圖片老是失敗，下面給大家提供一個PHP5.6以上的上傳圖片的例子

       /**
       * 上傳永久圖片的介面------------------------------------------------------------------------
       */
	public function actionNewupload()
	{
		$TOKEN=$this->actionToken();
		$file = "D:/upload/bb4.png";
		$data = array(
            'media'=> new CURLFile($file)
        );
	    $url = 'https://api.weixin.qq.com/cgi-bin/material/add_material?access_token='.$TOKEN.'&type=image';
        $result = $this->curl_posts($url,$data);
        var_dump($result);
	}

	function curl_posts($url, $data, $header = array()){
            if(function_exists('curl_init')) {
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $url);
                if(is_array($header) && !empty($header)){
                    $set_head = array();
                    foreach ($header as $k=>$v){
                        $set_head[] = "$k:$v";
                    }
                    curl_setopt($ch, CURLOPT_HTTPHEADER, $set_head);
                }
                curl_setopt($ch, CURLOPT_HEADER, 0);
                curl_setopt($ch, CURLOPT_POST, 1);
                curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_TIMEOUT, 0);// 1s to timeout.
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
                $response = curl_exec($ch);
                if(curl_errno($ch)){
                    //error
                    return curl_error($ch);
                }
                $reslut = curl_getinfo($ch);
                print_r($reslut);
                curl_close($ch);
                $info = array();
                if($response){
                    $info = json_decode($response, true);
                }
                return $info;
            } else {
                throw new Exception('Do not support CURL function.');
            }
    }