get tweets by twitter api

通过 twitter api 获取推特某用户的推文

<?php
    function buildBaseString($baseURI, $method, $params) {
        $r = array();
        ksort($params);
        foreach($params as $key=>$value){
            $r[] = "$key=" . rawurlencode($value);
        }
        return $method."&" . rawurlencode($baseURI) . '&' . rawurlencode(implode('&', $r));
    }
    function buildAuthorizationHeader($oauth) {
        $r = 'Authorization: OAuth ';
        $values = array();
        foreach($oauth as $key=>$value)
            $values[] = "$key=\"" . rawurlencode($value) . "\"";
        $r .= implode(', ', $values);
        return $r;
    }
    function returnTweet(){
        $oauth_access_token         = "oauth_access_token";
        $oauth_access_token_secret  = "oauth_access_token_secret";
        $consumer_key               = "consumer_key";
        $consumer_secret            = "consumer_secret";
        $twitter_timeline           = "user_timeline";  //  mentions_timeline / user_timeline / home_timeline / retweets_of_me
        //  create request
            $request = array(
                'screen_name'       => 'GbrilliantQ',
                'count'             => '3'
            );
        $oauth = array(
            'oauth_consumer_key'        => $consumer_key,
            'oauth_nonce'               => time(),
            'oauth_signature_method'    => 'HMAC-SHA1',
            'oauth_token'               => $oauth_access_token,
            'oauth_timestamp'           => time(),
            'oauth_version'             => '1.0'
        );
        //  merge request and oauth to one array
            $oauth = array_merge($oauth, $request);
        //  do some magic
            $base_info              = buildBaseString("https://api.twitter.com/1.1/statuses/$twitter_timeline.json", 'GET', $oauth);
            $composite_key          = rawurlencode($consumer_secret) . '&' . rawurlencode($oauth_access_token_secret);
            $oauth_signature            = base64_encode(hash_hmac('sha1', $base_info, $composite_key, true));
            $oauth['oauth_signature']   = $oauth_signature;
        //  make request
            $header = array(buildAuthorizationHeader($oauth), 'Expect:');
            $options = array( CURLOPT_HTTPHEADER => $header,
                              CURLOPT_HEADER => false,
                              CURLOPT_URL => "https://api.twitter.com/1.1/statuses/$twitter_timeline.json?". http_build_query($request),
                              CURLOPT_RETURNTRANSFER => true,
                              CURLOPT_SSL_VERIFYPEER => false);
            $feed = curl_init();
            curl_setopt_array($feed, $options);
            $json = curl_exec($feed);
            curl_close($feed);
        return $json;
    }
    $tweet = returnTweet();
    echo $tweet;
?>