Getting text from Wikipedia

I have a database of products, there is a column called "wikiurl" which relates to the Wikipedia URL. My question is what is the best way to extract the intro paragraph from wikipedia. So for example if "wikiurl" = "iPhone" then I would want to get the first paragraph from the page: http://en.wikipedia.org/wiki/Iphone

I'm using PHP and CodeIgniter. Whats the best way to scrape this info?
alex_wareingAsked:
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Roger BaklundCommented:
The code below seems to do what you want. It fetches the first paragraph from the page. I am not sure if this will work with all articles.

Some warnings are generated during the parsing, which is why I used error_reporting() to supress them.
error_reporting(E_ALL^E_WARNING);
$d = new DOMDocument();
$d->loadHTMLFile('http://en.wikipedia.org/wiki/Iphone');
$paras = $d->getElementsByTagName('p');
echo $paras->item(0)->nodeValue;

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