Untitled

<?php
/*
Plugin Name: Title Grabber
Plugin URI: http://preow.com/plugins/title-grabber/
Description: Adds a title attribute to links that don't have one, grabs title's from the page the link goes to.
Author: Nick Dienstbier
Version: 1.3
Author URI: http://preow.com
*/

if ( !defined('site_url') ) {
    define('site_url', trailingslashit(get_settings('siteurl')));
}
if ( !defined('site_path') ) {
    define('site_path', str_replace(('http://' . $_SERVER['HTTP_HOST']), '', site_url));
}
if ( !defined('site_host') ) {
    if ( preg_match("/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/", $_SERVER['HTTP_HOST']) || ( strpos($_SERVER['HTTP_HOST'], '.') === false )) {
        define('site_host', $_SERVER['HTTP_HOST']);
    }
    else {
        preg_match("/([^\.]+\.)*([^\.]+\.[^\.]+)/", $_SERVER['HTTP_HOST'], $out);
        define('site_host', end($out));
    }
}
if ( !defined('pattern_anchor') ) {
    define('pattern_anchor', "/<a[^>]*?href=(\".+?\"|'.+?')[^>]*>/");
}

class title_grabber {
    function title_grabber() { 
        $this->path = str_replace(str_replace("\\", "/", ABSPATH), '', str_replace("\\", "/", dirname(__FILE__))); 
        add_filter('publish_post', array(&$this, 'change_links'));
    }
    
    function change_links($id) {
		global $wpdb;
		$text = $wpdb->get_var("SELECT post_content FROM $wpdb->posts WHERE ID = $id");
         $newText = addslashes(preg_replace_callback(pattern_anchor, array(&$this, 'change_link'), stripslashes($text)));
		$wpdb->query("UPDATE $wpdb->posts SET post_content = '$newText' WHERE ID = $id");
		return $id;
    } 
    
    function grab_title($url) {
		$filetypes = array(".zip", ".png", ".gif", ".jpg", ".rar", ".exe", ".txt", ".pdf", ".psd");
		if(strpos($url, $filetypes)) {
			return $url;
		}
       $pURL = parse_url($url);
		if (empty($pURL['host'])) {
			return $url;
		}
		if (empty($pURL['path'])) {
			$pURL['path'] = '/';
		}
		if (empty($pURL['query'])) {
			$document = $pURL['path'];
		} else {
			$document = $pURL['path'] . '?' . $pURL['query'];
		}
		$fp = fsockopen($pURL['host'], 80, $errno, $errstr, 30);
		if (!$fp) {
			return $url;
		} else {
			$out = "GET $document HTTP/1.1\r\n";	
			$out .= "Host: {$pURL['host']}\r\n";
			$out .= "Connection: Close\r\n\r\n";
			$received = '';
			fwrite($fp, $out);
			while (!feof($fp)) {
				$received .= fgets($fp, 128);
			}
			fclose($fp);
		}
		if (!preg_match('~<title>(.*)</title>~isu', $received, $matches)) {
			return $url;
		}
		return trim(strip_tags($matches[1]));
    }
   
    function change_link($link) {
        $href = trim($link[1], "\"'");
        if (strpos($href, "http://") !== false && strpos($href, site_host) === false) {
            $newlink = str_replace(">", ' title="'.$this->grab_title($href).'">', $link[0]);
        }
		else {			$newlink = $link[0];		}
        return $newlink;    
    }
}

$title_grabber =& new title_grabber;
?>