微信公衆號 上傳和下載臨時素材(永久的只是url的不同，日後再補回)

最近幾天都在準備研究微信api，發現網上很少有發表一些比較正規api開發demo，所以現介紹兩個比較小的api功能-上傳和下載臨時素材。因爲做得比較衝忙所以沒添加註釋，日後補回。還有一句祝大家新年快樂

<?php 
/**
*Author Timson^(*(oo)*)^
*Time 2016/1/29
*/
define('APPID','INPUT YOUR APPID');
define('SECRET','INPUT YOUR SECRET');
class GetWCApi {
private $grant_type = array('accesstoken'=>'client_credential');
private $curl_url = array('accesstoken'=>'https://api.weixin.qq.com/cgi-bin/token?','sendMenu'=>'https://api.weixin.qq.com/cgi-bin/menu/create?','upload'=>'http://file.api.weixin.qq.com/cgi-bin/media/upload?','getmedia'=>'https://api.weixin.qq.com/cgi-bin/media/get?');
private $uploadtype = array(1=>'image',2=>'voice',3=>'video',4=>'thumb');
private $appid;
private $secret;
private $accesstoken;
function __construct($appid,$secret,$accesstoken = NULL) {
$this ->appid = $appid;
$this ->secret = $secret;
$this ->accesstoken = $accesstoken;
}

public function GetMaterial($type,$mediaid) {
if(!$this ->accesstoken) {
$resultjson = $this ->GetAccessToken();
$resultarr = json_decode($resultjson,true);
$this ->accesstoken = $resultarr['access_token'];
$accesstoken = $this ->accesstoken;
}
$url = $this->curl_url['getmedia'];
$param = array();
$param['access_token'] = $this ->accesstoken;
$param['media_id'] = $mediaid;
$url = $this->GetUrl($url,$param);
$resultcontent = $this ->_requestUrl($url);
$imagepath = dirname(__File__).'/../images/wechat/'.$type.'/'.time().rand(0,999).'.'.$type;
$result = $this ->saveWeChatFile($imagepath,$resultcontent);
if($result) {
return $imagepath;
}
else {
return false;
}
}
public function UploadMaterial($type,$filepath) {
if(!$this ->accesstoken) {
$resultjson = $this ->GetAccessToken();
$resultarr = json_decode($resultjson,true);
$this ->accesstoken = $resultarr['access_token'];
}
$url = $this->curl_url['upload'];
$param = array();
$param['access_token'] = $this ->accesstoken;
$param['type'] = $this ->uploadtype[$type];
$url = $this->GetUrl($url,$param);
$postfile = array('media'=>'@'.$filepath);
$result = $this ->_requestUrl($url,$postfile,true);
return $result;
}
private function GetAccessToken() {
$url = $this->curl_url['accesstoken'];
$param = array();
$param['grant_type'] = $this ->grant_type['accesstoken'];
$param['appid'] = $this ->appid;
$param['secret'] = $this ->secret;
$url = $this->GetUrl($url,$param);
$accesstoken = $this ->_requestUrl($url);
return $accesstoken;
}
private function _requestUrl($url,$param = null,$ispost = false) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
if($ispost) {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,$param);
}
$response = curl_exec($ch);
curl_close($ch);
return $response;


}
private function GetUrl($url,$param) {
$params = http_build_query($param);
$url = $url.$params;
return $url;
}
private function saveWeChatFile($filename,$filecontent) {
$local_file = fopen($filename,'w');
if($local_file !== false) {
if(fwrite($local_file,$filecontent) !== false) {
fclose($local_file);
return true;
}
else {
return false;
}

}
else {
return false;
}
}
} 
$GetWCApi = new GetWCApi(APPID,SECRET);



//2聲明上傳(臨時素材)
/*$upfile = dirname(__File__)."/../images/trainstop .png";
$getresult = $GetWCApi ->UploadMaterial(1,$upfile);
    */

//3獲取臨時元素
/*$getresult = $GetWCApi ->GetMaterial('jpg','3Xqin7qm8wXktNQs9GkOJjqRVM3WkBi8qtKhOMduljwunq0KlaWRRbAGfuiBOkbG');*/






?>