Simple PHP script to verify HTTP response codes from domain list

address-response-verification.php

<?php

$addresses  = file('addresses.txt', FILE_IGNORE_NEW_LINES);
$responding = [];

foreach ($addresses as $address) {
    if ($url = parse_url($address)) {
        if (!isset($url['scheme'])) {
            $address = 'http://' . $address;
        }
    }

    if (!filter_var($address, FILTER_VALIDATE_URL)) {
        print($address . ' doesn\'t qualify as an valid URL').PHP_EOL;
        continue;
    }

    $ch = curl_init($address);

    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_TIMEOUT,4);

    $output = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    if ($httpCode !== 0) {
        print($address . ' has HTTP code: ' . $httpCode) . PHP_EOL;
        if (in_array($httpCode, [301, 302])) {
            $address = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
            print('=> ' . $address).PHP_EOL;
        }

        $responding[$httpCode][] = $address;
    }

    file_put_contents('result.txt', print_r($responding, true));
    curl_close($ch);
}