/**
  * 上传素材
  */
function add_material($url){
    $access_token = wx_access_token();
    $wx_url = "https://api.weixin.qq.com/cgi-bin/material/add_material?access_token={$access_token}&type=image"
    $real_path = "{$_SERVER[‘DOCUMENT_ROOT‘]}{$url}";
    $result = http_post($wx_url, $real_path);
    $arr = json_decode($result,true);
    return $arr;
}

/**
  * 获取access_token
  */
 function wx_access_token(){
    $config=C(‘WEIXINPAY_CONFIG‘);
    $url = ‘https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=‘.$config[‘APPID‘].‘&secret=‘.$config[‘APPSECRET‘]; 
    $result = json_decode(wx_curl($url),true);
    return $result[‘access_token‘];
 }

function http_post($url =‘‘ , $fileurl = ‘‘ )
{
    $curl = curl_init();
    if(class_exists(‘\CURLFile‘)){
        curl_setopt ( $curl, CURLOPT_SAFE_UPLOAD, true); 
        $data = array(‘media‘ => new \CURLFile($fileurl));
    }else{
        if (defined ( ‘CURLOPT_SAFE_UPLOAD‘ )) {  
            curl_setopt ( $curl, CURLOPT_SAFE_UPLOAD, false );  
        }  
        $data = array(‘media‘ => ‘@‘ . realpath($fileurl));
    }
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); 
    $output = curl_exec($curl);
    curl_close($curl);
    return $output;
}