Question

how i can redirect all subdomain without change url

aslo send subdomain and request file with GET method to index.php file,
with .htaccess
for example

http://testsubdomain.mysite.ir/test.php

redirect to

http://mysite.ir/users/index.php?domain=testsubdomain&file=test.php

Answer 1

Use mod_rewrite. Example:

RewriteEngine On
RewriteBase /testsubdomain/
RewriteRule ^(.*)\.php$  http://mysite.ir/users/index.php?domain=testsubdomain&file=$1.php

Details here: http://httpd.apache.org/docs/current/mod/mod_rewrite.html