htaccess redirect only if domain matches

Question

I have a problem where I need to redirect my domain before it hits php. By the time it hits the ability to execute a header, it is too late.

How can I do

Answer 1

As of Apache 2.4 you can use an Directive to achieve what you suggested:

  RedirectMatch (.*) http://www.example2.com$1

For a case-insensitive version that matches with or without the www you can do:

  RedirectMatch (.*) http://www.example2.com$1

Sources:

• Apache Blog: New in httpd 2.4: If, ElseIf, and Else
• Apache 2.4 Documentation: If Directive