PHP根据URL提取根域名

php代码

ViaooChain 维奥连锁招商网站系统

网站功能资讯模块资料模块会员模块产品展示模块产品订购模块购物车模块留言模块在线加盟模块多级后台管理系统网站环境本系统为 asp.net开发donet版本为1.1框架数据库为acdess2000授权方式为免费，本版本本地可直接运行（使用http://localhost或http://127.0.0.1访问）如需放到外网通过域名访问，则需通过qq联系我免费索取钥匙文件，将钥匙文件放到网站空间根目录即可

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domain;echo "\n";
echo getBaseDomain('http://51.ca/index.php')->domain;echo "\n";
echo getBaseDomain('http://blog.ab.cc.win.aisa.hk/index.php')->domain;echo "\n";


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

	$res = null;
	$res->domain = null;
	$res->host = null;
	$url_parse = parse_url(strtolower($url));
	$urlarr = explode(".", $url_parse['host']);
	$count = count($urlarr);
	
	if($count domain = $url_parse['host'];
	}elseif($count > 2){
		$last = array_pop($urlarr);
		$last_1 = array_pop($urlarr);
		$last_2 = array_pop($urlarr);
		
		$res->domain = $last_1.'.'.$last;
		$res->host = $last_2;
		
		if(in_array($last, $state_domain)){
			$res->domain=$last_1.'.'.$last;
			$res->host=implode('.', $urlarr);
		}
		
		if(in_array($last_1, $state_domain)){
			$res->domain = $last_2.'.'.$last_1.'.'.$last;
			$res->host = implode('.', $urlarr);
		}
		#print_r(get_defined_vars());die;
	}
	return $res;
	
}