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A PHP script to take an RSS feed and Twitter the links.
<?php
/*
RSS to Twitter using PHP.
By: Colin Devroe
http://cdevroe.com/
http://github.com/cdevroe
Written on December 6, 2009 while watching
Star Trek III: The Search for Spock.
*/
$wpUrl = 'http://cdevroe.com/';
$categoryToTwitter = 'Mobile photos';
$cacheDir = "/home/.eastwood/cdevroe/cdevroe.com/wp-content/cache/";
$twitter = array('username' => 'USERNAME', 'password' => 'PASSWORD');
// Retrieve and parse RSS feed
$curl = curl_init($wpUrl.'feed/');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($curl);
curl_close($curl);
$xml = str_replace("&#8217;","'",$xml); $xml = str_replace("&#160;","",$xml); // Replace ' and nbsp
$parsedXml = new SimpleXMLElement($xml);
// Retrieve and load Cache
$cacheFile = $cacheDir . "flickrCache.txt"; $timeout = 12; // In hrs.
if ($cached = @file_get_contents($cacheFile)) { $cached = unserialize($cached); }
if (!$cached || !is_array($cached)) { $cached = array_fill(0, 19, "-"); }
// Loop through RSS feed items and post to Twitter
foreach ($parsedXml->channel->item as $post) {
$url = split('=',$post->guid); // [0] Base URL [1] WP postID
$shortUrl = $wpUrl.'p/'.$url[1]; unset($url);
if ($post->pubDate != NULL) { $date = strtotime($post->pubDate); } else { $date = $post->pubDate; }
/* Post to Twitter if:
a. The link has never been tweeted.
b. The post is less than (timeout) hours old.
c. The category is (categoryToTwitter) */
if (in_array($shortUrl, $cached) === false && ($date == NULL || $date > time() - (60 * 60 * $timeout)) && $post->category[0] == $categoryToTwitter) {
$twitterMessage = rtrim($post->category[0], "s").' "'.$post->title.'": '.$shortUrl;
$curl = curl_init("http://twitter.com/statuses/update.xml?status=". urlencode($twitterMessage));
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_USERPWD, $twitter['username'].":". $twitter['password']);
$tweet = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
curl_close($curl);
if ($status == 200) {
$cached[] = $shortUrl;
if (count($cached) > 50) { array_shift($cached); }
} else {
echo '<p>Tried to Twitter: '.$twitterMessage.' - Error status: '.$status;
}
} // end if (post to twitter)
} // end foreach
// Write cache to cachefile
$f = fopen($cacheFile,"w+");
fwrite($f,serialize($cached));
fclose($f);
?>
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