问file_get_html在活动服务器中返回null，但在本地主机中工作良好。

EN

require_once('advanced_html_dom.php');

$dom = file_get_html('http://exams.keralauniversity.ac.in/Login/index.php?reslt=1');

$rows = array();
foreach($dom->find('tr.Function_Text_Normal:has(td[3])') as $tr){
  $row['num'] = $tr->find('td[2]', 0)->text;
  $row['text'] = $tr->find('td[3]', 0)->text;
  $row['pdf'] = $tr->find('td[3] a', 0)->href;
  if(preg_match_all('/\d+/', $tr->parent->find('u', 0)->text, $m)){
    list($row['day'], $row['month'], $row['year']) = $m[0];
  }

  // uncomment next 2 lines to save the pdf
  // $filename = preg_replace('/.*\//', '', $row['pdf']);
  // file_put_contents($filename, file_get_contents($row['pdf']));
  $rows[] = $row;
}
var_dump($rows);