php - publish as a page admin using SDK -


i using latest version of facebook's php sdk.i have e page admin. tried post page update using graph api. here code:

//index.php $fb = new facebook\facebook([     'app_id'     => $log_json['app_id'],     'app_secret' => $log_json['app_secret'],     'default_graph_version' => 'v2.4', ]);  $helper = $fb->getredirectloginhelper();  $permissions = ['manage_pages', 'pages_show_list', 'publish_pages']; $callback = 'http://localhost:8000/return.php'; $loginurl = $helper->getloginurl($callback, $permissions);  echo '<a href="'.$loginurl.'">log in facebook!</a>';

and last part:

//return.php $fb = new facebook\facebook([     'app_id'     => $log_json['app_id'],     'app_secret' => $log_json['app_secret'],     'default_graph_version' => 'v2.4',]); $helper = $fb->getredirectloginhelper();  $client = $fb->getoauth2client();  //for long lived access token  try {     $accesstoken = $helper->getaccesstoken(); } catch(facebook\exceptions\facebooksdkexception $e) {     // there error communicating graph     echo $e->getmessage();     exit; } if (isset($accesstoken)) {     $longaccesstoken = $client->getlonglivedaccesstoken($accesstoken);     db::savelonglivedtoken($longaccesstoken); //save token database     $_session['facebook_access_token'] = db::getlonglivedtoken();     //dump($response);     $res = $fb->post('<page id>/feed', array('message' => 'hello'), $_session['facebook_access_token']);     dump($res);      exit; } elseif ($helper->geterror()) {  ....     exit; }

but when return.php tried call api throws error:

fatal error: uncaught exception 'facebook\exceptions\facebookauthorizationexception' message '(#200) user hasn't authorized application perform action' in.............


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