# ------------------------------------------
# FIND -------------------------------------

		$this->addCallback(
			'mt.publishPost',
			'this:mt_publishPost',
			array('boolean','string','string','string'),
			'changes the status of the current article to published'
		);		

# ADD AFTER

		$this->addCallback(
			'pingback.ping',
			'this:pingback_ping',
			array('boolean', 'string', 'string'),
			'pingback server'
		);

# ------------------------------------------
# FIND -------------------------------------

	# MediaObjects

# ADD BEFORE

	# Pingback
	function pingback_ping($params) {
		list($pagelinkedfrom, $pagelinkedto) = $params;
		$pagelinkedfrom = doSlash($pagelinkedfrom);
		$pagelinkedto = doSlash($pagelinkedto);

		$title = '';

		$pagelinkedfrom = str_replace('&', '&', $pagelinkedfrom);
		$pagelinkedto = preg_replace('#&([^amp\;])#is', '&$1', $pagelinkedto);

		// Check IP
		$ip = $_SERVER['REMOTE_ADDR'];
		$checkBan = fetch('ip', 'txp_discuss_ipban', 'ip', $ip);
		if (!empty($checkBan))
			return new IXR_Error(49, gTxt('you_have_been_banned'));
		$blacklisted = is_blacklisted($ip);
		if ($blacklisted)
			return new IXR_Error(49, gTxt('your_ip_is_blacklisted_by').' '.$blacklisted);

		// Check URI
		$pos1 = strpos($pagelinkedto, str_replace(array('http://www', 'http://', 'https:/www', 'https://'), '', hu));
		if (!$pos1)
			return new IXR_Error(0, 'Is there no link to us?');

		include_plugin('bat_trackback_lib');
		$post_ID = (int) url_to_postid($pagelinkedto);
		if (!$post_ID)
			return new IXR_Error(33, 'The specified target URI cannot be used as a target. It either doesn\'t exist, or it is not a pingback-enabled resource.');

		$post = safe_row('*', 'textpattern', "ID='$post_ID'");
		if (!$post)
			return new IXR_Error(33, 'The specified target URI cannot be used as a target. It either doesn\'t exist, or it is not a pingback-enabled resource.');

		if ($post_ID == @url_to_postid($pagelinkedfrom))
			return new IXR_Error(0, 'The source URI and the target URI cannot both point to the same resource.');

		$dupe = getRow("SELECT * FROM ".PFX."txp_trackback WHERE parentid='$post_ID' AND url='$pagelinkedfrom'");
		if($dupe)
			return new IXR_Error(48, 'The pingback has already been registered.');

		sleep(1);

		$linea = wp_remote_fopen($pagelinkedfrom);
		if (!$linea)
			return new IXR_Error(16, 'The source URI does not exist.');
		$linea = str_replace('<!DOC', '<DOC', $linea);
		$linea = preg_replace('/[\s\r\n\t]+/', ' ', $linea);
		$linea = preg_replace("/<(h1|h2|h3|h4|h5|h6|p|th|td|li|dt|dd|pre|caption|input|textarea|button|body)[^>]*>/", "\n\n", $linea);

		preg_match('|<title>([^<]*?)</title>|is', $linea, $matchtitle);
		$title = $matchtitle[1];
		if (empty($title))
			return new IXR_Error(32, 'We cannot find a title on that page.');
		$linea = strip_tags($linea, '<a>');
		$p = explode("\n\n", $linea);

		$sem_regexp_pb = "/(\\/|\\\|\*|\?|\+|\.|\^|\\$|\(|\)|\[|\]|\||\{|\})/";
		$sem_regexp_fix = "\\\\$1";
		$link = preg_replace($sem_regexp_pb, $sem_regexp_fix, $pagelinkedfrom);
		$finished = false;

		foreach($p as $para) {
			if ($finished)
				continue;
			if (strstr($para, $pagelinkedto)) {
				$context = preg_replace( "/.*<a[^>]+".$link."[^>]*>([^>]+)<\/a>.*/", "$1", $para );
				$excerpt = strip_tags( $para );
				$excerpt = trim( $excerpt );
				$use     = preg_quote( $context );
				$excerpt = preg_replace("|.*?\s(.{0,100}$use.{0,100})\s|s", "$1", $excerpt);
				$finished = true;

			}
		}
		if (empty($context))
			return new IXR_Error(17, 'The source URI does not contain a link to the target URI, and so cannot be used as a source.');

		$pagelinkedfrom = preg_replace('#&([^amp\;])#is', '&amp;$1', $pagelinkedfrom);
		$context = '[...] '.wp_specialchars($excerpt).' [...]';
		$original_pagelinkedfrom = $pagelinkedfrom;
		$pagelinkedfrom = doSlash($pagelinkedfrom);
		$original_title = $title;

		$parentid = $post_ID;
		$url = $pagelinkedfrom;
		$excerpt = $context;
		$type = 'pingback';

		$trackbackdata = compact('parentid', 'title', 'excerpt', 'url', 'type', 'ip');

		require_once txpath.'/lib/constants.php';
		require_once txpath.'/publish/taghandlers.php';

		$updated = bat_new_trackback($trackbackdata);
		if ($updated)
			return "Pingback from $pagelinkedfrom to $pagelinkedto registered. Keep the web talking! :-)";
		else
			return new IXR_Error(320603, 'unable to log.');
	}

# ------------------------------------------
# FIND -------------------------------------

?>

# ADD BEFORE

// Functions from Wordpress http://wordpress.org
function wp_remote_fopen($uri) {
	if (ini_get('allow_url_fopen')) {
		$fp = fopen($uri, 'r');
		if (!$fp)
			return false;
		$linea = '';
		while($remote_read = fread($fp, 4096))
			$linea .= $remote_read;
		fclose($fp);
		return $linea;
	} elseif (function_exists('curl_init')) {
		$handle = curl_init();
		curl_setopt($handle, CURLOPT_URL, $uri);
		curl_setopt($handle, CURLOPT_CONNECTTIMEOUT, 1);
		curl_setopt($handle, CURLOPT_RETURNTRASFER, 1);
		$buffer = curl_exec($handle);
		curl_close($handle);
		return $buffer;
	} else {
		return false;
	}
}

function wp_specialchars($text) {
	$text = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/', '&#038;$1', $text);
	$text = str_replace('<', '&lt;', $text);
	$text = str_replace('>', '&gt;', $text);
	return $text;
}