取得ie地址欄的訪問者域名.

<?php
$s = 'http://bbs.VeVb.com';
$s = parse_url($s);
$s = strtolower($s['host']) ; //取域名部分
//echo $s;

$domain = array('com','cn','name','org','net'); //域名后綴 有新的就擴展這吧
$ss = $s;
$dd = implode('|',$domain);
$ss = preg_replace('/(/.('.$dd.'))*/.('.$dd.')$/iu','',$ss); 把后面的域名后綴部分去掉
 
$ss = explode('.',$ss);
$ss = array_pop($ss);  //取最后的主域名
$ss = substr($s,strrpos($s,$ss));  //加上后綴拼成完成的主域名
echo $ss;
?>