Yahoo Answers API не работает

Я нашел пример API PHP, который хотел бы реализовать, и он, похоже, не работает.

<?php /** * @package Yahoo Answer * @author The HungryCoder * @link http://hungrycoder.xenexbd.com/?p=953 * @version 1.0 * @license GPL, This class does not come with any expressed or implied warranties! Use at your own risks! */ class yahooAnswer{ var $appID; var $searchQuestionURL = 'http://answers.yahooapis.com/AnswersService/V1/questionSearch?'; var $getQuestionURL = 'http://answers.yahooapis.com/AnswersService/V1/getQuestion?'; private $numResults = 10; private $numStart = 0; function __construct($appid) { $this->appID=$appid; } function set_numResults($num_results){ $this->numResults = $num_results; } /** * Search for questions for the given keywords. Returned results can be associative array or XML * @param <string> $kewyord * @return <string> Returns the results set either in XML format or associative array. */ function search_questions($params){ if(!is_array($params)){ throw new Exception('The parameters must be an array!'); } $defaults = array( 'search_in' => '', 'category_name' => '', 'date_range' => '', //7, 7-30, 30-60, 60-90, more90 'sort' => 'relevance', //relevance, date_desc, date_asc 'type' => 'all', 'output' => 'php', 'results' => $this->numResults, 'start' => $this->numStart, 'region' => 'us', 'appid' => $this->appID, ); $params = array_merge($defaults,$params); if(!$params['appid']){ throw new Exception('APP ID is empty!', 404); } if(!$params['query']) { throw new Exception('Query is not set!', '404'); } $req_params = $this->array2query_string($params); $url = $this->searchQuestionURL.$req_params; $results = $this->make_call($url); if($params['output']=='php'){ $results = unserialize($results); return $results['Questions']; } return $results; } /** * Get all answers of a given question ID * @param <array> $params keys are: question_id, output, appid * @return <string> Returns all answers in expected format. default format is php array */ function get_question($params){ if(!is_array($params)){ throw new Exception('The parameter must be an array!'); } $defaults = array( 'question_id' => '', 'output' => 'php', 'appid' => $this->appID, ); $params = array_merge($defaults,$params); if(!$params['appid']){ throw new Exception('APP ID is empty!', 404); } if(!$params['question_id']) { throw new Exception('Question ID is not set!', '404'); } $req_params = $this->array2query_string($params); $url = $this->getQuestionURL.$req_params; $results = $this->make_call($url); if($params['output']=='php'){ $results = unserialize($results); return $results['Questions'][0]; } return $results; } protected function make_call($url){ if(function_exists('curl_init')){ $ch = curl_init($url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1); curl_setopt($ch, CURLOPT_TIMEOUT,60); $result = curl_exec($ch); curl_close($ch); return $result; } else if(function_exists('file_get_contents')) { return file_get_contents($url); } else { throw new Exception('No method available to contact remote server! We must need cURL or file_get_contents()!', '500'); } } protected function array2query_string($array){ if(!is_array($array)) throw new Exception('Parameter must be an array', '500'); $params =''; foreach($array as $key=>$val){ $params .= "$key=$val&"; } return $params; } } $appid = "myId"; $params = array( 'query' => 'keyword', //enter your keyword here. this will be searched on yahoo answer 'results' => 10, //number of questions it should return 'type' => 'resolved', //only resolved questiosn will be returned. other values can be all, open, undecided 'output' => 'php', //result will be PHP array. Other values can be xml, json, rss ); $query = 'yoga'; //enter your keyword here to search for $yn = new yahooAnswer($appid); //search questions try{ $questions = $yn->search_questions($params); } catch (Exception $e){ echo ($e->getMessage()); } ?> 

Но когда я $appid определение $appid я получаю сообщение, APPID пуст, и когда я добавляю свой appid для $appid я просто получаю пустую страницу, но у меня есть приложение, и я копирую его прямо из Yahoo.

Любые предложения о том, как это сделать?