在一堆文本中提取出 域名(脚本).php

<?php
function domain($url){
$arr1=array(
'ac','ad','ae','aero','af','ag','ai','al','am','an','ao','aq','ar','arpa','as','asia','at','au','aw','ax','az','ba','bb','bd','be','bf','bg','bh','bi','biz','bj','bl','bm','bn','bo','br','bs','bt','bv','bw','by','bz','ca','cat','cc','cd','cf','cg','ch','ci','ck','cl','cm','cn','co','com','coop','cr','cu','cv','cx','cy','cz','de','dj','dk','dm','do','dz','ec','edu','ee','eg','eh','er','es','et','eu','fi','fj','fk','fm','fo','fr','ga','gb','gd','ge','gf','gg','gh','gi','gl','gm','gn','gov','gp','gq','gr','gs','gt','gu','gw','gy','hk','hm','hn','hr','ht','hu','id','ie','il','im','in','info','int','io','iq','ir','is','it','je','jm','jo','jobs','jp','ke','kg','kh','ki','km','kn','kp','kr','kw','ky','kz','la','lb','lc','li','lk','lr','ls','lt','lu','lv','ly','ma','mc','md','me','mf','mg','mh','mil','mk','ml','mm','mn','mo','mobi','mp','mq','mr','ms','mt','mu','museum','mv','mw','mx','my','mz','na','name','nc','ne','net','nf','ng','ni','nl','no','np','nr','nu','nz','om','org','pa','pe','pf','pg','ph','pk','pl','pm','pn','pr','pro','ps','pt','pw','py','qa','re','ro','rs','ru','rw','sa','sb','sc','sd','se','sg','sh','si','sj','sk','sl','sm','sn','so','sr','st','su','sv','sy','sz','tc','td','tel','tf','tg','th','tj','tk','tl','tm','tn','to','tp','tr','travel','tt','tv','tw','tz','ua','ug','uk','um','us','uy','uz','va','vc','ve','vg','vi','vn','vu','wf','ws','ye','yt','yu','za','zm','zw',
);
$arr2=array(
'ac','ad','ae','aero','af','ag','ai','al','am','an','ao','aq','ar','arpa','as','asia','at','au','aw','ax','az','ba','bb','bd','be','bf','bg','bh','bi','biz','bj','bl','bm','bn','bo','br','bs','bt','bv','bw','by','bz','ca','cat','cc','cd','cf','cg','ch','ci','ck','cl','cm','cn','co','com','coop','cr','cu','cv','cx','cy','cz','de','dj','dk','dm','do','dz','ec','edu','ee','eg','eh','er','es','et','eu','fi','fj','fk','fm','fo','fr','ga','gb','gd','ge','gf','gg','gh','gi','gl','gm','gn','gov','gp','gq','gr','gs','gt','gu','gw','gy','hk','hm','hn','hr','ht','hu','id','ie','il','im','in','info','int','io','iq','ir','is','it','je','jm','jo','jobs','jp','ke','kg','kh','ki','km','kn','kp','kr','kw','ky','kz','la','lb','lc','li','lk','lr','ls','lt','lu','lv','ly','ma','mc','md','me','mf','mg','mh','mil','mk','ml','mm','mn','mo','mobi','mp','mq','mr','ms','mt','mu','museum','mv','mw','mx','my','mz','na','name','nc','ne','net','nf','ng','ni','nl','no','np','nr','nu','nz','om','org','pa','pe','pf','pg','ph','pk','pl','pm','pn','pr','pro','ps','pt','pw','py','qa','re','ro','rs','ru','rw','sa','sb','sc','sd','se','sg','sh','si','sj','sk','sl','sm','sn','so','sr','st','su','sv','sy','sz','tc','td','tel','tf','tg','th','tj','tk','tl','tm','tn','to','tp','tr','travel','tt','tv','tw','tz','ua','ug','uk','um','us','uy','uz','va','vc','ve','vg','vi','vn','vu','wf','ws','ye','yt','yu','za','zm','zw',
);
$str1=implode('|',$arr1);
$str2=implode('|',$arr2);
//preg_match(('#(https:\/\/|http:\/\/)?([\w]*\.)?[\w-]+(?<!-_)\.(?:\w+)(\.\w+)*#i'), $url, $domain);
preg_match(('#(https:\/\/|http:\/\/)?([\w]*\.)?[\w-]+(?<!-_)\.(?:'.$str1.')(\.'.$str2.')*#i'), $url, $domain);
if(is_array($domain) && count($domain)>0){
        $domain_name=empty($domain[0])?'':trim($domain[0]);
    if(strlen($domain_name)>0){
                $domain_name=@trim($domain_name,'/');
                $domain_name=@trim($domain_name,'-');
                $domain_name=@trim($domain_name,'_');
        return $domain_name;
        }
 }
}

foreach (glob("./txt/*.txt") as $filename) { 
foreach (file ($filename) as $str){
echo  domain(trim($str)).PHP_EOL;
}

}
?>