reading url like facebook

does any one have an idea about how Facebook read URL and
extract title and a text from the page.
I got the title but the text?

 

when you give URL to facebook it returns the title of the page, a small text ,and the images from that page.
I want to know how this work or if there is any script I can use to do that.
take in mind that the text from the page is the problem.

 

$url="http://www.studiesinn.com/";
$lines = file($url);
$pageSource='';
foreach ($lines as $line_num => $line) {
$pageSource.=$line;
}

$title_str=explode('<title>',$pageSource);
$title_str2=explode('</title>',$title_str[1]);

//This is your Page Title:
$page_title=$title_str2[0];

$desc_str=explode('<meta name="Description" content="',$pageSource);
$desc_str2=explode('" />',$desc_str[1]);

//This is your page meta description
$page_desc=$desc_str2[0];

Take a look on this and refine this code.

 

wow ... thanks for this code ...

yes, url structure fb so strange

 

thanks
i used this http://simplehtmldom.sourceforge.net/
but facebook doesn't get the text from
<meta name="Description"
it reads the page and give you the text from it.