public function uploadImg($imgUrl){

  $TOKEN=$this->getAccessToken();
  $URL ='http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token='.$TOKEN.'&type=image';
  $data = array('media'=>'@'.$imgUrl);
  $result = $this->curl_post($URL,$data);
  $data = @json_decode($result,true);
  
  return $data['media_id'];
 }

 public function getAccessToken(){

  $url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wxe574b1bd35d7d4da&secret=d4624c36b6795d1d99dcf0547af5443d'; 
  
  $result = json_decode($this->curlGet($url),true);

  return $result['access_token'];
 }

 function curl_post($url, $data = null)
{
 //創(chuàng)建一個新cURL資源
 $curl = curl_init();
 //設置URL和相應的選項 
 curl_setopt($curl, CURLOPT_URL, $url);
 if (!empty($data)){
  curl_setopt($curl, CURLOPT_POST, 1);
  curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
 }
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 //執(zhí)行curl，抓取URL并把它傳遞給瀏覽器
 $output = curl_exec($curl);
 //關閉cURL資源，并且釋放系統(tǒng)資源
 curl_close($curl);
 return $output;
}

array (
 'type' => 'image',
 'media_id' => 'W89mt3FEaxXOMOw0fLj2Cb6A8vfMjuXrj6XW59O3l9a7Tj_h2SjlBEr4dvp4Du2R',
 'created_at' => 1464140301,