Pi-hole Whitelist & Blacklist Addition Script

add.php

<?php
// Bookmark: javascript:void(window.open('http://pi.hole/add.php?action=w&url='+location.href, '_blank'));
// Modify the above URL accordingly
// Whitelist: action=w
// Blacklist: action=b

$action = $_GET['action'];

if (isset($_GET['url'])) {

    if (isset($_GET['w'])) $action .= " -d";

    $url = parse_url($_GET['url'], PHP_URL_HOST);

    if (substr($url, 0, 4) === 'www.') {

        $urls[0] = $url;
        $urls[1] = substr($url, 4);

    } else {

        $urls[0] = $url;
        $urls[1] = 'www.' . $url;

    }

    foreach ($urls AS $each_url) {

        exec("sudo pihole -$action $each_url", $output, $status);

    }

    print("<pre>");
    for ($i = 0; $i < sizeof($output); $i++) {
        print(str_replace("\u{001b}[K", "", $output[$i]) . "<br />\n");
    }
    print("</pre>");

    if (!isset($_GET['w'])) {

        $wl_or_bl = ($action === 'w' ? 'WHITELIST' : 'BLACKLIST'); ?>

        <p><input type="button" value="UNDO ACTION (REMOVE DOMAIN FROM <?php echo $wl_or_bl; ?>)"
                  onclick="location.href=location.href+'&w';"/></p><?php

    }

} else {

    print("Something went wrong. Please try again.");

}