ImpressCMS/impresscms

<?php
/**
 * Functions needed by the ImpressCMS installer
 *
 * @copyright    http://www.impresscms.org/ The ImpressCMS Project
 * @license        http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU General Public License (GPL)
 * @package        installer
 * @author        marcan <marcan@impresscms.org>
 * @author        modified by UnderDog <underdog@impresscms.org>
 * @version        $Id: functions.php 12329 2013-09-19 13:53:36Z skenow $
 */


/**
 * Function to get the base domain name from a URL.
 * credit for this function should goto Phosphorus and Lime, it is released under GPL (v2).
 * http://phosphorusandlime.blogspot.com/2007/08/php-get-base-domain.html
 *
 * @param string $url the URL to be stripped.
 * @return string
 */
function imcms_get_base_domain($url)
{
    $debug = 0;
    $base_domain = '';

    // generic tlds (source: http://en.wikipedia.org/wiki/Generic_top-level_domain)
    $G_TLD = array(
     'biz','com','edu','gov','info','int','mil','name','net','org','aero','asia','cat','coop','jobs','mobi','museum','pro','tel','travel',
     'arpa','root','berlin','bzh','cym','gal','geo','kid','kids','lat','mail','nyc','post','sco','web','xxx',
     'nato', 'example','invalid','localhost','test','bitnet','csnet','ip','local','onion','uucp','co');

    // country tlds (source: http://en.wikipedia.org/wiki/Country_code_top-level_domain)
    $C_TLD = array(
    // active
     'ac','ad','ae','af','ag','ai','al','am','an','ao','aq','ar','as','at','au','aw','ax','az',
     'ba','bb','bd','be','bf','bg','bh','bi','bj','bm','bn','bo','br','bs','bt','bw','by','bz',
     'ca','cc','cd','cf','cg','ch','ci','ck','cl','cm','cn','co','cr','cu','cv','cx','cy','cz',
     'de','dj','dk','dm','do','dz','ec','ee','eg','er','es','et','eu','fi','fj','fk','fm','fo',
     'fr','ga','gd','ge','gf','gg','gh','gi','gl','gm','gn','gp','gq','gr','gs','gt','gu','gw',
     'gy','hk','hm','hn','hr','ht','hu','id','ie','il','im','in','io','iq','ir','is','it','je',
     'jm','jo','jp','ke','kg','kh','ki','km','kn','kr','kw','ky','kz','la','lb','lc','li','lk',
     'lr','ls','lt','lu','lv','ly','ma','mc','md','mg','mh','mk','ml','mm','mn','mo','mp','mq',
     'mr','ms','mt','mu','mv','mw','mx','my','mz','na','nc','ne','nf','ng','ni','nl','no','np',
     'nr','nu','nz','om','pa','pe','pf','pg','ph','pk','pl','pn','pr','ps','pt','pw','py','qa',
     're','ro','ru','rw','sa','sb','sc','sd','se','sg','sh','si','sk','sl','sm','sn','sr','st',
     'sv','sy','sz','tc','td','tf','tg','th','tj','tk','tl','tm','tn','to','tr','tt','tv','tw',
     'tz','ua','ug','uk','us','uy','uz','va','vc','ve','vg','vi','vn','vu','wf','ws','ye','yu',
     'za','zm','zw',
    // inactive
     'eh','kp','me','rs','um','bv','gb','pm','sj','so','yt','su','tp','bu','cs','dd','zr');

    // get domain
    if (!$full_domain = imcms_get_url_domain($url)) {return $base_domain;}

    // break up domain, reverse
    $DOMAIN = explode('.', $full_domain);
    if ($debug) print_r($DOMAIN);
    $DOMAIN = array_reverse($DOMAIN);
    if ($debug) print_r($DOMAIN);

    // first check for ip address
    if (count($DOMAIN) == 4 && is_numeric($DOMAIN[0]) && is_numeric($DOMAIN[3])) {return $full_domain;}

    // if only 2 domain parts, that must be our domain
    if (count($DOMAIN) <= 2) return $full_domain;

    /*
     finally, with 3+ domain parts: obviously D0 is tld now,
     if D0 = ctld and D1 = gtld, we might have something like com.uk so,
     if D0 = ctld && D1 = gtld && D2 != 'www', domain = D2.D1.D0 else if D0 = ctld && D1 = gtld && D2 == 'www',
     domain = D1.D0 else domain = D1.D0 - these rules are simplified below.
     */
    if (in_array($DOMAIN[0], $C_TLD) && in_array($DOMAIN[1], $G_TLD) && $DOMAIN[2] != 'www')
    {
        $full_domain = $DOMAIN[2].'.'.$DOMAIN[1].'.'.$DOMAIN[0];
    } else {
        $full_domain = $DOMAIN[1].'.'.$DOMAIN[0];
    }
    // did we succeed?
    return $full_domain;
}

/**
 * Function to get the domain from a URL.
 * credit for this function should goto Phosphorus and Lime, it is released under GPL (v2).
 * http://phosphorusandlime.blogspot.com/2007/08/php-get-base-domain.html
 *
 * @param string $url the URL to be stripped.
 * @return string
 */
function imcms_get_url_domain($url)
{
    $domain = '';
    $_URL = parse_url($url);

    if (!empty($_URL) || !empty($_URL['host'])) {$domain = $_URL['host'];}
    return $domain;
}