result

foreach ($pages['data'] as $page) {
    if($page['id']==171360273518){
        $page_access_token = $page['access_token'];
        $page_conversations = $facebook->api('{page_id}/conversations', 'GET', array('access_token' => $page_access_token));
    }else{
        echo "Youre not admin";
        var_dump($page);
        echo '<br>------------------<br>';
        var_dump($page['id']);
        echo '<br>-------end-------<br>';
    }
}