header(“Content-type: text/css”); is working in Firefox and Chrome, but in Internet Explorer 9 it shows up as 'text/html'

Question

header(\"Content-type: text/css\"); works in Firefox, Chrome and other, but not in Internet Explorer 9. I am not sure what\'s up.

In Chrome an

Answer 1

Is there any output before the header is sent? BOM in the php file? A carriage return?

If you disabled error reporting, you may not see the error it should trigger.

Try adding ob_start() on top, it will resolve any issue related to headers already sent before any header() call.

If you have a BOM in your UTF8 file, you may want to remove it.

Answer 2

For Internet Explorer 9 serving HTTP 406 status code in the response header for a dynamically generated CSS file we:

1. Removed the Apache mod_negiotiation module or added -Multiviews to the host configuration (or .htaccess).
2. Activated Apache mod_rewrite

3. Added a rewrite rule to the virtual host configuration or htaccess:

   <IfModule mod_rewrite.c
   
     RewriteEngine on
     RewriteBase /
   
     #serve CSS and JS from combine.php
     RewriteRule ^combine(.*) combine.php [NC,L]
   
   </IfModule>
   

Note: This solution is only good for servers/virtual-hosts not using Multiviews as removing mod_negotiation removes usage of this directive as well.