Twitter API to RSS

.htaccess

RewriteEngine on
RewriteBase   /twitter
RewriteRule ^(.*)$ twitter2rss.php [NC]

twitter2rss.php

<?php
/**
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* All I ask is for you to mention where you got it from.
*/

/**
 * This is taken from my rss reader and I thought I redo it as a standalone
 * piece of code for others to use.  I was thinking about making it a service
 * but I don't know how to go about getting the ok for more then 150 calls
 * per hour.
 */

/**
 * Install
 * Place in a directory called twitter. 
 */

/**
 * Usage
 * 1) /twitter/username - this gives the statuses from the named user.
 * 2) /twitter/username/favorites - returns the favorites from the named user.
 * 3) /twitter/username/listname - returns the tweets from a users list.
 */

//Configuration

//set $only_links = 1 if you want to only include tweets with links.
$only_links = 1;

//set $title2tweet = 0 if you want use the first link to the title rather then to the tweet.
$title2tweet = 0;

//set a proxy if needed
//$proxy = '10.0.6.251:3128';
$proxy = '';

//modify case of hashtags 1 = lower, 2 = upper
$tag_case = 0;


//end configuration


$uri = strtolower(str_replace('/twitter','',$_SERVER['REQUEST_URI']));

echo '<?xml version="1.0" encoding="UTF-8"?>',PHP_EOL;
echo '<rss version="2.0">',PHP_EOL;

set_time_limit(120);
error_reporting(E_ERROR | E_WARNING | E_PARSE);


$parts = explode('/',$uri);
if (count($parts) == 3) {
   switch ($parts[2]=='favorites') {
      case 'favorites':
         $url = 'http://api.twitter.com/1/favorites/'.$parts[1].'.json';
         $feed_title=$parts[1].'\'s Favorites';
         break;
      default:
         $url = 'http://api.twitter.com/1/lists/statuses.json?slug='.$parts[2].'&owner_screen_name='.$parts[1].'&include_entities=true&include_rts=true&count=200';
         $feed_title=$parts[2].' via '.$parts[1];
         break;
   }
} else {
   $url = 'http://api.twitter.com/1/statuses/user_timeline.json?screen_name='.$parts[1].'&include_entities=true&include_rts=true&count=200';
   $feed_title=$parts[1].'\'s Tweets';
}
//echo $url;
$t = get_url($url);
$tweets = json_decode($t);


echo '<channel>',PHP_EOL;
echo '   	<title>',$feed_title,'</title>',PHP_EOL;
echo '   	<link>https://twitter.com/#!',$uri,'</link>',PHP_EOL;
echo '   	<generator>http://punchingsoup.com/</generator>',PHP_EOL;
echo '   	<url>'.$url.'</url>',PHP_EOL;


foreach ($tweets as $tweet) {
   $has_link = 0;
   $retweeted = 0;

   if (isset($tweet->retweeted_status)) { $retweeted = 1; }
  
   if ($retweeted == 0) {
      $text = clean_string($tweet->text);
      $text = clean_string($tweet->text);
   } else {
      $text = clean_string($tweet->retweeted_status->text);
   }
   
   preg_match('#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is',$text,$links);
   $has_link = sizeof($links);

   if ($has_link >= $only_links ) {
      $item_id = $tweet->id_str;
      echo '<item>',PHP_EOL;

         // Link
         $link = 'http://twitter.com/'.$screen_name.'/status/'.$tweet->id_str;
         
         if ($title2tweet == 0 && $has_link > 0 ) {
   		   echo '<link>',$links[0],'</link>',PHP_EOL;
         } else {
   		   echo '<link>',$link,'</link>',PHP_EOL;
         }
   		echo '<guid isPermaLink="false">',$link,'</guid>',PHP_EOL;

         // Author
         if ($retweeted == 0) {
            $author_name = $tweet->user->name;
            $author_link = 'http://twitter.com/'.$tweet->user->screen_name;
            $screen_name = $tweet->user->screen_name;
         } else {
            $author_name = $tweet->retweeted_status->user->name;
            $author_link = 'http://twitter.com/'.$tweet->retweeted_status->user->screen_name;
            $screen_name = $tweet->retweeted_status->user->screen_name;
         }
         $author_email = '';

         // title
         $title = $text;
   		echo '<title>',$title,'</title>',PHP_EOL;

         // content
         $text = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"\\2\" target=\"_blank\">\\2</a>", $text);
         $text = preg_replace('/(@)([0-9a-zA-Z]*)/','<a target="_new" href="http://twitter.com/\2">\1\2</a>',$text);
         if ($retweeted == 0) {
            $content  = '<div class="tweet_image" style="float:left;padding:10px;"><img src="'.$tweet->user->profile_image_url.'"></div><div class="tweet_content" style="padding:10px;font-size:1.2em;">';
            $content .= '<a href="http://twitter.com/'.$tweet->user->screen_name.'" target="_new" style="color:black;text-decoration:none;font-weight:bold;">'.$tweet->user->screen_name.'</a> <span style="color:#bbb;">'.$tweet->user->name.'</span>';
            
         } else {
            $content  = '<div class="tweet_image" style="float:left;padding:10px;"><img src="'.$tweet->retweeted_status->user->profile_image_url.'"></div><div class="tweet_content" style="padding:10px;font-size:1.2em;">';
            $content .= '<a href="http://twitter.com/'.$tweet->retweeted_status->user->screen_name.'" target="_new" style="color:black;text-decoration:none;font-weight:bold;">'.$tweet->retweeted_status->user->screen_name.'</a> <span style="color:#bbb;">' . $tweet->retweeted_status->user->name . ' <img src="theme/default/icons/retweet.png"> via ' . $tweet->user->screen_name . '</span>';
         }
         $content .= '<br />'.$text;
         $content .= '<br /><a href="https://twitter.com/#!/'.$screen_name.'/status/'.$item_id.'" target="_blank">Open on Twitter</a>';
         $content .= '</div>';

         //favorites
         //https://api.twitter.com/1/favorites/create/72820884053819394.json

         //retweet
         //https://api.twitter.com/1/statuses/retweet/72820884053819394.json

         //status use %20 rather then +
         //https://twitter.com/?status=

   		echo '<description><![CDATA[',$content,']]></description>',PHP_EOL;

         $published = date("D, d M Y H:i:s T",strtotime($tweet->created_at));
		   echo '<pubDate>',$published,'</pubDate>',PHP_EOL;


         // categories
         preg_match_all("/(#\w+)/",$text,$tags);
         foreach ($tags[0] as $tag) {
            if (strlen($tag) <= 30) {
               if ($tag_case == 1) { $tag = strtolower($tag); }
               if ($tag_case == 2) { $tag = strtoupper($tag); }
               $tag = preg_replace('/[^A-Za-z0-9$tag_charkeep]/i', '', $tag);
               $tag = str_replace("'","''",$tag);
      		   echo '<category><![CDATA[',$tag,']]></category>',PHP_EOL;
               
            }
         }

        echo '</item>',PHP_EOL;

   }

}
echo '</channel>',PHP_EOL;
echo '</rss>',PHP_EOL;

   
   
function clean_string($c) {
   $c = utf8_decode($c);
   $c = str_replace(chr(160),"",$c);
   return $c;
}
  
function get_url($u) {
   global $proxy;
   $ch = curl_init();
   curl_setopt ($ch, CURLOPT_URL, $u); 
   curl_setopt ($ch, CURLOPT_HEADER, 0);
   if ($proxy != '') { curl_setopt($ch, CURLOPT_PROXY, $proxy); }
   curl_setopt ($ch, CURLOPT_USERAGENT, 'punchingsoup');
   curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, true);
   curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
   $result = curl_exec ($ch);
   curl_close ($ch);
   return $result;
}


?>