apache泛域名配置方法

<VirtualHost *:80>
DocumentRoot /var/html/blog.zzzyk.com/
ServerName zzzyk.com
ServerAlias *.zzzyk.com
DirectoryIndex index.html index.php

RewriteEngine on
RewriteCond %{HTTP_HOST} ^[a-zA-Z0-9]+.blog.sjzycxx.cn$
RewriteRule ^/?$ /%{HTTP_HOST}
RewriteRule ^/([a-zA-Z0-9]+).blog.sjzycxx.cn/?$ /index.php?user=$1

</VirtualHost>

<?php
$url_this=$_SERVER ['HTTP_HOST'];
$url_this=str_replace ("www.", "", $url_this);
$url_this=str_replace (".zzzyk.com", "", $url_this);
$url_this=str_replace ("'", "", $url_this);
$url_this=str_replace ("@", "", $url_this);
$url_this=str_replace ("=", "", $url_this);
$url_this=str_replace (";", "", $url_this);

?>