从curl切换到multi_curl或加速url验证器

Question

i have a database with reciprocal urls and check it daily for availability, so i can sort available links with unavailable.

i do it in such way:

<?php

foreach($urls as $url) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible;)');
  curl_setopt($ch, CURLOPT_URL,$url );
  curl_setopt($ch, CURLOPT_HEADER, 1);
  curl_setopt($ch, CURLOPT_TIMEOUT, 30);
  curl_setopt($ch, CURLOPT_NOBODY, TRUE);
  curl_setopt($ch, CURLOPT_FAILONERROR, TRUE);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 60000);
  curl_setopt($ch, CURLOPT_PROXY, '127.0.0.1:107');

  $page = curl_exec($ch);
  $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

  curl_close($ch);  

  if($httpcode>=100 && $httpcode<600) echo $httpcode; else echo '0';
}

?>

It output the header code. How can i use same function in more sleep way? because in this way to execute this script take about 15 minutes for 100 links. Thank you for any ideas and suggestions. I also tried to use multi_curl, but cant understand how to manage outputs.