help me to get link title

[borobari]

this is my php code please anyone add here when some one post a link automatically get link title like Facebook

<?
function img_preg($arr)
{
return '<img src="http://'.$_SERVER['HTTP_HOST'].'/go.php?go='.base64_encode(html_entity_decode($arr[1])).'" alt="img" />';
}
function links_preg1($arr)
{
global $set;
if (ereg('^http://'.$_SERVER['HTTP_HOST'],$arr[1]) || !ereg('://',$arr[1]))
return '<a href="'.$arr[1].'">'.$arr[2].'</a>';
else
return '<a'.($set['web']?' target="_blank"':null).' href="http://'.$_SERVER['HTTP_HOST'].'/go.php?go='.base64_encode(html_entity_decode($arr[1])).'">'.$arr[2].'</a>';
}
function links_preg2($arr)
{
global $set;
if (ereg('^http://'.$_SERVER['HTTP_HOST'],$arr[2]))
return $arr[1].'<a href="'.$arr[2].'">'.$arr[2].'</a>'.$arr[4];
else
return $arr[1].'<a'.($set['web']?' target="_blank"':null).' href="http://'.$_SERVER['HTTP_HOST'].'/go.php?go='.base64_encode(html_entity_decode($arr[2])).'">'.$arr[2].'</a>'.$arr[4];
}
function links($msg)
{
global $set;
if ($set['bb_img'])$msg=preg_replace_callback('/\[img\](.+)\[\/img\]/isU', 'img_preg', $msg);
if ($set['bb_url'])$msg=preg_replace_callback('/\[url=(.+)\](.+)\[\/url\]/isU', 'links_preg1', $msg); 
if ($set['bb_http'])$msg=preg_replace_callback('~(^|\s)([a-z]+://([^ \r\n\t`\'"]+))(\s|$)~iu', 'links_preg2', $msg);
return $msg;
}

?>

[something else]

use the search function you will find your answer

[GumSlone]

$site_url = $_REQUEST['site_url'];
    if(filter_var($site_url, FILTER_VALIDATE_URL))
    {
        $html = file_get_contents($site_url);
        if(!empty($html))
        {
            //parsing begins here:
            $doc = new DOMDocument();
            @$doc->loadHTML($html);
            $nodes = $doc->getElementsByTagName('title');
            
            //get and display what you need:
            $tags['title'] = $nodes->item(0)->nodeValue;
            if(empty($tags['title']))
            {
                $parse = parse_url($site_url);
                $tags['title'] = $parse['host'];
            }
            $metas = $doc->getElementsByTagName('meta');
            
            for ($i = 0; $i < $metas->length; $i++)
            {
                $meta = $metas->item($i);
                if($meta->getAttribute('name') == 'description')
                        $tags['description'] = $meta->getAttribute('content');
                if($meta->getAttribute('name') == 'keywords')
                        $tags['keywords'] = $meta->getAttribute('content');
            }
        }
    }

print_r($tags);