Auto submit form using php

[Sitemon]

how can I auto submit a form using php? I know this is posible in javascript but I am not sure with PHP. If can, will you please post a sample how to do it?

[Sitemon]

POST example:

<?
   $url = 'http://localhost/curl/1.php';
   $params = "keyword=123&zxczxc=333"; //you must know what you want to post
   $user_agent = "Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)";
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
   curl_setopt($ch, CURLOPT_URL,$url);
   curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

   $result=curl_exec ($ch);
   curl_close ($ch);

   echo "Results: <br>".$result;
?>

1.php (just for test)

<?
print_r($_POST);
?>