$r = M_VK::Instance()->ApiVkSend("groups.search","access_token=". M_VK::Instance()->token.'&q=Ростов&fields=members_count&count=1000','json_array');

$result=[];

$groups=array_slice($r['response'],1);
echo "groups count: ".count($groups)."\n";

$f=fopen('C:/pr.txt','a+');
$q=0;
$files=0;
foreach($groups as $group) {
	$result =geMembers($group);


	if($result==null)
		break;

	$q += count($result);

	foreach ($result as $fields) {
		$fields['city_id']=$fields['city']['id'];
		$fields['group_id']=$group['gid'];
		unset($fields['city']);
		fputcsv($f, $fields);
	}

	if ($q >= 1000000) {
		$f=fopen('C:/pr'.(++$files).'.txt','a+');
		$q=0;
	}
}

fclose($f);

function geMembers($group) {
	//print_r($group);
	echo "Loading Members for : " . $group['gid'].' '. $group['members_count'] ."\n";
	$result=[];
	$count= $group['members_count'];
	$loaded=0;

	while($count-$loaded >10) {
		sleep(1);
		$r = M_VK::Instance()->ApiVkSend("execute","access_token=". M_VK::Instance()->token,'json_array', 'code=' . getCode($group['gid'],$count,$loaded));

		if(isset($data['error'])) {
			echo "ERROR occured" ;
			print_r($data['error']) ;
			return null;
		}

		$data=$r['response'];
		echo "Members loaded: ". count($data)."\n";
		$result+=$data;
		$loaded+=count($data);
	}
	return $result;
}

function getCode($gr_id,$count,$offset) {