Código
function getImage($url) { // GET IMDB image try { $doc = new DOMDocument(); $xpath = new DOMXPath($doc); return $xpath->query('//td[@id="img_primary"]/a/img')->item(0)->getAttribute('src'); } catch( Exception $e ) { return null; } } echo getImage("http://www.imdb.com/title/tt0137523/");