Checkmail function - php

Question

I'm creating a method to validate if an email exists.
I need to do this:
Insert several emails in a spreadsheet, save and in the html page, through a function 'file.onchange = function', select this file to validate through this check:
<?php
define ('DEBUG_OK', false);
class CCheckMail
{
var $timeout = 10;
var $domain_rules = array ("aol.com", "bigfoot.com", "brain.net.pk", "breathemail.net",
"compuserve.com", "dialnet.co.uk", "glocksoft.com", "home.com",
"msn.com", "rocketmail.com", "uu.net", "yahoo.com", "yahoo.de");
function _is_valid_email ($email = "")
{ return preg_match('/^[.\w-]+#([\w-]+\.)+[a-zA-Z]{2,6}$/', $email); }
function _check_domain_rules ($domain = "")
{ return in_array (strtolower ($domain), $this->domain_rules); }
function execute ($email = "")
{
if (!$this->_is_valid_email ($email))
{ return false; }
$host = substr (strstr ($email, '#'), 1);
if ($this->_check_domain_rules ($host))
{ return false; }
$host .= ".";
if (getmxrr ($host, $mxhosts[0], $mxhosts[1]) == true)
{ array_multisort ($mxhosts[1], $mxhosts[0]); }
else
{
$mxhosts[0] = $host;
$mxhosts[1] = 10;
}
if (DEBUG_OK) { print_r ($mxhosts); }
$port = 25;
$localhost = $_SERVER['HTTP_HOST'];
$sender = 'info#' . $localhost;
$result = false;
$id = 0;
while (!$result && $id < count ($mxhosts[0]))
{
if (function_exists ("fsockopen"))
{
if (DEBUG_OK) { print_r ($id . " " . $mxhosts[0][$id]); }
if ($connection = fsockopen ($mxhosts[0][$id], $port, $errno, $error, $this->timeout))
{
fputs ($connection,"HELO $localhost\r\n"); // 250
$data = fgets ($connection,1024);
$response = substr ($data,0,1);
if (DEBUG_OK) { print_r ($data); }
if ($response == '2') // 200, 250 etc.
{
fputs ($connection,"MAIL FROM:<$sender>\r\n");
$data = fgets($connection,1024);
$response = substr ($data,0,1);
if (DEBUG_OK) { print_r ($data); }
if ($response == '2') // 200, 250 etc.
{
fputs ($connection,"RCPT TO:<$email>\r\n");
$data = fgets($connection,1024);
$response = substr ($data,0,1);
if (DEBUG_OK) { print_r ($data); }
if ($response == '2') // 200, 250 etc.
{
fputs ($connection,"data\r\n");
$data = fgets($connection,1024);
$response = substr ($data,0,1);
if (DEBUG_OK) { print_r ($data); }
if ($response == '2') // 200, 250 etc.
{ $result = true; }
}
}
}
fputs ($connection,"QUIT\r\n");
fclose ($connection);
if ($result) { return true; }
}
}
else
{ break; }
$id++;
}
return false;
}
}
?>
However, I am not able to create the structure to validate.
I had created an array with some emails inserted in it, however, it only validates when executing the page, if the emails are valid or not, example:
<?php
include ("CCheckMail.php");
$checkmail = new CCheckMail ();
$emails = array ("pedroiagobucci#gmail.com", "invalid#email.com", "setec#freemail.it", "thisdoesentexist#google.com");
foreach ($emails as $email)
{
if ($checkmail->execute ($email))
{ print ("Address $email exists!<br>"); }
else
{ print ("Address $email <strong>not</strong> exists!<br>"); }
}
?>
can you help me?