Can I do an if/then/else in htaccess?

Question

I have a site that serves up certain content based on the subdomain. So it is the same set of files, and maybe the header and some info in the site pages changes based on t

Answer 1

Try something like this:

SetEnvIf Host ^abc\. HOST_ABC
SetEnvIf Host ^dev\. HOST_DEF

<IfDefine HOST_ABC>
    AuthUserFile …
</IfDefine>
<IfDefine HOST_DEF>
    AuthUserFile …
</IfDefine>

Answer 2

which webserver are you using?

a technique that may work on several different servers (it certainly works in apache) is to have a different .htaccess file in the directory corresponding to each subdomain.

Answer 3

You can use pseudo else with an exclamation mark. See the second directive in the example below MemCache vs !MemCache:

<IfDefine MemCache>
   LoadModule mem_cache_module   modules/mod_mem_cache.so
</IfDefine>
<IfDefine !MemCache>
   LoadModule cache_disk_module   modules/mod_cache_disk.so
</IfDefine>

Taken from the apache docs: https://httpd.apache.org/docs/2.4/mod/core.html#ifdefine

Answer 4

You can't use if/else because htaccess isn't a list of instructions. But, if you use a conditional block like <IfModule mod_rewrite.c> or <IfDefine something>, you can use different directives based on which subdomain is being requested. I'm not sure which one you would use though...

You could also put one .htaccess file one level above the files and use <Directory something> to specify different rules for each subdomain, but make the subdomain directories all be symlinks to the same directory with the shared files.

so this would be the directory above the web root(s):
.htaccess
sitefiles
subdomain1 (symlink to sitefiles)
subdomain2 (symlink to sitefiles)
...

Answer 5

If it were me (and I haven't thought to do this before) I would:

1. Use an internal redirect using mod_rewrite to different site roots (/suba or /subb) depending on some factors (emulating IF/ELSE)
2. Use symlinks on the public directory, but not the .htaccess

so:

/sites/subdomain_a/.htaccess
/sites/subdomain_a/pub
/sites/subdomain_b/.htaccess
/sites/subdomain_b/pub

where

/sites/subdomain_a/pub == /sites/subdomain_b/pub

using

ln -s

or similar. Then use mod_rewrite to redirect (internally) to the right site root. I think mod_rewrite is run before .htaccess is loaded.

This means you are effectively serving the same site files with a different .htaccess depending on the subdomain.

Hope this helps, bit of a hack.

Would be interested to see if something better exists.