get-array-of-domains.php

<?php

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://data.iana.org/TLD/tlds-alpha-by-domain.txt");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$list = curl_exec($ch);
curl_close($ch);

$list = str_replace("\r", "", $list);
$list = array_filter((array)explode("\n", $list));

$new = array();
foreach ($list as $_domain)
{
    $_domain = trim($_domain);
    if (substr($_domain, 0, 1) == '#')
    {
        continue;
    }
    $new[] = mb_strtolower($_domain, 'UTF-8');
    $new[] = idn_to_utf8(mb_strtolower($_domain, 'UTF-8'));
}

$new = array_filter(array_unique($new));

foreach ($new as $_domain)
{
    echo '        ';
    echo "'";
    echo $_domain;
    echo "'";
    echo ",\n";
}