1 //PHP创建access_token.json文件,将access_token 和 生成时间expires 保存在其中, 2 //{"access_token":"xxxx","expires":1478799661} 3 function getToken(){ 4     $appid=‘*‘; 5     $appsecret=‘**‘; 6     $file = file_get_contents("./access_token.json",true); 7     $result = json_decode($file,true); 8     echo $time(); 9 if (time() > $result[‘expires‘]){10         $data = array();11         $data[‘access_token‘] = getNewToken($appid,$appsecret);12         $data[‘expires‘]=time()+7000;13         $jsonStr =  json_encode($data);14         $fp = fopen("./access_token.json", "w");15         fwrite($fp, $jsonStr);16         fclose($fp);17         return $data[‘access_token‘];18     }else{19         return $result[‘access_token‘];20     }21 }22 function getNewToken($appid,$appsecret){23     $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$appsecret}";24     $access_token_Arr =  https_request($url);25     return $access_token_Arr[‘access_token‘];26 }27 function https_request ($url){28         $ch = curl_init();29         curl_setopt($ch, CURLOPT_URL, $url);30         curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);31         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);32         $out = curl_exec($ch);33         curl_close($ch);34         return  json_decode($out,true);35 } 36 echo getToken();