<?php

$title_id = 'tt3721954';
$title_id = 'tt0460681';
$link = 'http://www.imdb.com/title/' . $title_id . '/';

$imdb_html = file_get_contents($link);

$dom = new DOMDocument();
libxml_use_internal_errors(true);
$dom->loadHTML($imdb_html);

$xpath = new DOMXPath($dom);
var_dump(
  $xpath->evaluate('string(//div[@class="poster"])')
);