只想present这个长链接login.mydomain.com/myusersaccount/loginaccount/login.php，这login.mydomain.com，所以，当我访问login.mydomain.com/myusersaccount/loginaccount/的login.php，它把我带到这个login.mydomain.com，这里是htaccess的在$ C $词的使用：

  RewriteEngine叙述上

的RewriteCond％{HTTP_HOST} ^ MYDOMAIN  .COM $ [NC]
重写规则^％{HTTP_HOST}％{REQUEST_URI} [NE，R = 301，L]

的RewriteCond％{HTTP_HOST} ^登录 .mydomain  .COM $ [NC]
重写规则^ $ http://login.mydomain.com/myusersaccount/loginaccount/login.php [R = 301，L]

的RewriteCond％{HTTP_HOST} ^！登录 .mydomain  .COM $ [NC]
重写规则^ myusersaccount / loginaccount /登录 .PHP $ http://login.mydomain.com {REQUEST_URI} [NE，R = 301，NC，L]

的RewriteCond％{HTTP_HOST}！^（WWW ）？MYDOMAIN  .COM $ [NC]
重写规则^ $ http://www.mydomain.com/ [NE，R = 301，L]
 

解决方案

从这样此规则中删除研究标记：

 的RewriteCond％{HTTP_HOST} ^登录 .mydomain  .COM $ [NC]
重写规则^ $ /myusersaccount/loginaccount/login.php [L]
 

just wish to present this long link login.mydomain.com/myusersaccount/loginaccount/login.php, to this login.mydomain.com, so that when i access login.mydomain.com/myusersaccount/loginaccount/login.php, it take me to this login.mydomain.com, here is the code i use in htaccess:

RewriteEngine On

RewriteCond %{HTTP_HOST} ^mydomain.com$ [NC]
RewriteRule ^ %{HTTP_HOST}%{REQUEST_URI} [NE,R=301,L]

RewriteCond %{HTTP_HOST} ^login.mydomain.com$ [NC]
RewriteRule ^$ http://login.mydomain.com/myusersaccount/loginaccount/login.php [R=301,L]

RewriteCond %{HTTP_HOST} !^login.mydomain.com$ [NC]
RewriteRule ^myusersaccount/loginaccount/login.php$ http://login.mydomain.com {REQUEST_URI} [NE,R=301,NC,L]

RewriteCond %{HTTP_HOST} !^(www.)?mydomain.com$ [NC]
RewriteRule ^$ http://www.mydomain.com/ [NE,R=301,L]

Remove the R flag from this rule like this:

RewriteCond %{HTTP_HOST} ^login.mydomain.com$ [NC]
RewriteRule ^$ /myusersaccount/loginaccount/login.php [L]