Question

Been trying to resolve this problem with a rewrite rule that assigns a subdomain to a root directory of the same name, for example.

ddd.example.com will link to "/_projects/ddd" directory, that works fine and I have no trouble with it, the issue is that any files or directories I have in the root directory "/" can be accessed from the subdomain ddd.example.com.

Here is an example directory structure

example.com = "/"

• "index.php"

ddd.example.com = "/_projects/ddd"

• no files

So if for instance I access ddd.example.com/index.php, it will resolve to using the file located example.com/index.php which is located a directory below.

Here is the rewrite rule for .htaccess

# Skip rewrite if subdomain is www 
RewriteCond %{HTTP_HOST} !^www\. [NC] 

# Extract (required) subdomain to %1 
RewriteCond %{HTTP_HOST} ^([^.]+)\.example\.com(:80)?$

# Redirect to domain if requested URL does not resolve to existing subdirectory path
RewriteCond %{DOCUMENT_ROOT}/_projects/%1 !-d
RewriteRule (.*) http://example.com/ [NC,R=301]

# Skip rewrite if subdomain is www 
RewriteCond %{HTTP_HOST} !^www\. [NC]

# Extract (required) subdomain to %1 
RewriteCond %{HTTP_HOST} ^([^.]+)\.example\.com(:80)?$

# Skip rewrite if requested URL does not resolve to existing subdirectory path or file
RewriteCond %{DOCUMENT_ROOT}/_projects/%1/$1 -f [OR]
RewriteCond %{DOCUMENT_ROOT}/_projects/%1/$1 -d
RewriteRule (.*) /_projects/%1/$1 [NC,L] 

Answer 1

Resolved the problem, seems that there was a looping problem that was breaking the rewrite.

##### Subdomain to subfolder
# Fix missing trailing slashes.
#RewriteCond %{HTTP_HOST} !^(www\.)?example\.com$ [NC]
#RewriteCond %{HTTP_HOST} ^(www\.)?([^\.]+)\.example\.com$ [NC]
#RewriteCond %{DOCUMENT_ROOT}/%2%{REQUEST_URI}/ -d
#RewriteRule [^/]$ %{REQUEST_URI}/ [R=301,L]

# Rewrite sub domains.
RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteCond %{HTTP_HOST} !^(www\.)?example\.com$ [NC]
RewriteCond %{HTTP_HOST} ^(www\.)?([^\.]+)\.example\.com$ [NC]
RewriteRule ^(.*)$ /projects/%2/$1 [QSA,L]