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<?php /** * TwitterOAuth - https://github.com/ricardoper/TwitterOAuth * PHP library to communicate with Twitter OAuth API version 1.1 * * @author Ricardo Pereira <github@ricardopereira.es> * @copyright 2013 */ namespace TwitterOAuth; use TwitterOAuth\Exception\TwitterException; class TwitterOAuth { protected $url = 'https://api.twitter.com/1.1/'; protected $outputFormats = array('text', 'json', 'array', 'object'); protected $defaultFormat = 'object'; protected $config = array(); protected $call = ''; protected $method = 'GET'; protected $getParams = array(); protected $postParams = array(); /** * Prepare a new conection with Twitter API via OAuth * * @params array $config Configuration array with OAuth access data */ public function __construct(array $config) { $required = array( 'consumer_key' => 'DYIUG3zgoOtujvpDuBNtXw', 'consumer_secret' => 'jIThRGktrPrvjzOGjNYxJMqdemimXQIlBmDMMk77j4', 'oauth_token' => '1358758812-uE8bDrcbTYC3F8eL7pKhuz3yOGo6dkgJlTgc1m4', 'oauth_token_secret' => 'U7JOzRhtbHSwPA1ObCy6amtnJU4ADXLfYxusy85Z6hmwS' ); if (count(array_intersect_key($required, $config)) !== count($required)) { throw new \Exception('Missing parameters in configuration array'); } if (!isset($config['output_format']) || !in_array($config['output_format'], $this->outputFormats)) { $config['output_format'] = $this->defaultFormat; } $this->config = $config; unset($required, $config); } /** * Send a GET call to Twitter API via OAuth * * @param string $call Twitter resource string * @param array $getParams GET parameters to send * @return mixed Output with selected format */ public function get($call, array $getParams = null) { $this->call = $call; if ($getParams !== null && is_array($getParams)) { $this->getParams = $getParams; } return $this->sendRequest(); } /** * Send a POST call to Twitter API via OAuth * * @param string $call Twitter resource string * @param array $postParams POST parameters to send * @param array $getParams GET parameters to send * @return mixed Output with selected format */ public function post($call, array $postParams = null, array $getParams = null) { $this->call = $call; $this->method = 'POST'; if ($postParams !== null && is_array($postParams)) { $this->postParams = $postParams; } if ($getParams !== null && is_array($getParams)) { $this->getParams = $getParams; } return $this->sendRequest(); } /** * Converting parameters array to a single string with encoded values * * @param array $params Input parameters * @return string Single string with encoded values */ protected function getParams(array $params) { $r = ''; ksort($params); foreach ($params as $key => $value) { $r .= '&' . $key . '=' . rawurlencode($value); } unset($params, $key, $value); return trim($r, '&'); } /** * Getting full URL from a Twitter resource * * @param bool $withParams If true then parameters will be outputted * @return string Full URL */ protected function getUrl($withParams = false) { $getParams = ''; if ($withParams === true) { $getParams = $this->getParams($this->getParams); if (!empty($getParams)) { $getParams = '?' . $getParams; } } return $this->url . $this->call . '.json' . $getParams; } /** * Getting OAuth parameters to be used in request headers * * @return array OAuth parameters */ protected function getOauthParameters() { $time = time(); return array( 'oauth_consumer_key' => $this->config['consumer_key'], 'oauth_nonce' => trim(base64_encode($time), '='), 'oauth_signature_method' => 'HMAC-SHA1', 'oauth_timestamp' => $time, 'oauth_token' => $this->config['oauth_token'], 'oauth_version' => '1.0' ); } /** * Converting all parameters arrays to a single string with encoded values * * @return string Single string with encoded values */ protected function getRequestString() { $params = array_merge($this->getParams, $this->postParams, $this->getOauthParameters()); $params = $this->getParams($params); return rawurlencode($params); } /** * Getting OAuth signature base string * * @return string OAuth signature base string */ protected function getSignatureBaseString() { $method = strtoupper($this->method); $url = rawurlencode($this->getUrl()); return $method . '&' . $url . '&' . $this->getRequestString(); } /** * Getting a signing key * * @return string Signing key */ protected function getSigningKey() { return $this->config['consumer_secret'] . '&' . $this->config['oauth_token_secret']; } /** * Calculating the signature * * @return string Signature */ protected function calculateSignature() { return base64_encode(hash_hmac('sha1', $this->getSignatureBaseString(), $this->getSigningKey(), true)); } /** * Converting OAuth parameters array to a single string with encoded values * * @return string Single string with encoded values */ protected function getOauthString() { $oauth = array_merge($this->getOauthParameters(), array('oauth_signature' => $this->calculateSignature())); ksort($oauth); $values = array(); foreach ($oauth as $key => $value) { $values[] = $key . '="' . rawurlencode($value) . '"'; } $oauth = implode(', ', $values); unset($values, $key, $value); return $oauth; } /** * Building request HTTP headers * * @return array HTTP headers */ protected function buildRequestHeader() { return array( 'Authorization: OAuth ' . $this->getOauthString(), 'Expect:' ); } /** * Processing Twitter Exceptions in case of error * * @param string $type Depends of response format (array|object) * @param mixed $ex Exceptions * @throws Exception\TwitterException */ protected function processExceptions($type, $ex) { switch ($type) { case 'array': foreach ($ex['errors'] as $error) { throw new TwitterException($error['message'], $error['code']); } break; default: foreach ($ex->errors as $error) { throw new TwitterException($error->message, $error->code); } } unset($tupe, $ex, $error); } /** * Outputs the response in the selected format * * @param string $response * @return mixed */ protected function processOutput($response) { $format = $this->config['output_format']; switch ($format) { case 'text': if (substr($response, 2, 6) == 'errors') { $response = json_decode($response); $this->processExceptions('object', $response); } break; case 'json': if (!headers_sent()) { header('Cache-Control: no-cache, must-ridate'); header('Expires: Tue, 19 May 1981 00:00:00 GMT'); header('Content-type: application/json'); } if (substr($response, 2, 6) == 'errors') { $response = json_decode($response); $this->processExceptions('object', $response); } break; case 'array': $response = json_decode($response, true); if (isset($response['errors'])) { $this->processExceptions('array', $response); } break; default: $response = json_decode($response); if (isset($response->errors)) { $this->processExceptions('object', $response); } } unset($format); return $response; } /** * Send GET or POST requests to Twitter API * * @throws Exception\TwitterException * @return mixed Response output */ protected function sendRequest() { $url = $this->getUrl(true); $header = $this->buildRequestHeader(); $options = array( CURLOPT_URL => $url, CURLOPT_HEADER => false, CURLOPT_HTTPHEADER => $header, CURLOPT_RETURNTRANSFER => true, CURLOPT_SSL_VERIFYPEER => false, ); if (!empty($this->postParams)) { $options[CURLOPT_POST] = count($this->postParams); $options[CURLOPT_POSTFIELDS] = $this->getParams($this->postParams); } $c = curl_init(); curl_setopt_array($c, $options); $response = curl_exec($c); curl_close($c); unset($options, $c); if (!in_array($response[0], array('{', '['))) { throw new TwitterException(str_replace(array("\n", "\r", "\t"), '', strip_tags($response)), 0); } return $this->processOutput($response); } }