Retrieve the first significant sentence from a wikipedia article

gistfile1.php

<?php

$id = $_GET['id'];

function getSignificantSentence($id) {

	$url = 'http://en.wikipedia.org/w/index.php?curid=' . $id;
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
	curl_setopt($ch, CURLOPT_USERAGENT, 'Geoloqi (Geo-coded Wikipedia Article Layer) http://geoloqi.com');
	$html = curl_exec($ch);
	
	// Article text is between "bodytext" comment tags
	if(preg_match('/<!-- bodytext -->(.+)<!-- \/bodytext -->/s', $html, $match)) {
		$article = $match[1];
	
		// Remove tables since they don't contain explanatory text
		$article = preg_replace('#<table[^>]*>.+?</table>#is', '', $article);
		
		// Remove thumbnail pictures
		$article = preg_replace('#<div class="thumb[^>]+>.+?</div>\s*</div>\s*</div>#s', '', $article);
	
		// Strip all remaining HTML tags to get plain text
		$article = strip_tags($article);
	
		// Split the text into sentences
		$sentences = preg_split('/(?<!(mr|ms|dr|mt|st))\.\s*/i', $article);
	
		// Look for the first sentence not in the format (* is * in *)
		$sentence = FALSE;
		foreach($sentences as $s) {
			$s = trim($s);
			if(preg_match('/.+ is .+ in .+/', $s) == FALSE) {
				$sentence = $s;
				break;
			}
		}
	
		return $sentence;
	}
	else {
		return FALSE;
	}
}