在ftp根目录下建立一个.htaccess文件夹，然后上传一下程序
从xxx.com跳转到www.xxx.com,具体程序如下显示
RewriteEngine on
RewriteCond %{http_host} ^xxx.com [NC]
RewriteRule ^(.*)$ http://www.xxx.com/$1 [L,R=301]
redphp开放平台主机免费试用三天！
从xxx.com跳转到www.xxx.com,具体程序如下显示
RewriteEngine on
RewriteCond %{http_host} ^xxx.com [NC]
RewriteRule ^(.*)$ http://www.xxx.com/$1 [L,R=301]
redphp开放平台主机免费试用三天！