<?php
  $original_file = file_get_contents("http://www.iiita.ac.in");
  $stripped_file = strip_tags($original_file, "<a>");
  preg_match_all("/<a(?:[^>]*)href=\"([^\"]*)\"(?:[^>]*)>(?:[^<]*)<\/a>/is", $stripped_file, $matches);

  //DEBUGGING

  //$matches[0] now contains the complete A tags; ex: <a href="link">text</a>
  //$matches[1] now contains only the HREFs in the A tags; ex: link

  header("Content-type: text/plain"); //Set the content type to plain text so the print below is easy to read!
  print_r($matches); //View the array to see if it worked
?>