htaccess of virtual subdomain with subfolders

currently i have achieved

www.username.domain.com to redirect to domain.com/folder1/folder2/index.php?id=username

with my current .htacceess

RewriteCond %{HTTP_HOST} !开发者_运维百科^www\.domain\.com$
RewriteCond %{HTTP_HOST} ^www\.(.*)\.domain\.com$
RewriteRule ^$  http://domain.com/general/user/index.php?id=%1 [P,L]

i want to achieve this

www.username.domain.com/pagename/ to redirect to domain.com/folder1/folder2/next.php?id=username www.username.domain.com/pagename/variable to redirect to domain.com/folder1/folder2/next.php?id=username$val=variable

Please help

Use this rule (place after yours):

RewriteCond %{HTTP_HOST} !^www\.domain\.com$
RewriteCond %{HTTP_HOST} ^www\.(.*)\.domain\.com$
RewriteRule ^pagename/([^/]*)$  http://domain.com/folder1/folder2/next.php?id=%1&val=$1 [P,L]

This will work for both www.username.domain.com/pagename/ and www.username.domain.com/pagename/variable (for 1st URL value of val= will be empty string).

P.S. I assume $ character is a typo in your 2nd destination URL (domain.com/folder1/folder2/next.php?id=username$val=variable) and it should be & instead.