Generate Subdomain From PHP form

Question

I would like to create a registration page which takes user information and generates a user profile subdomain. Example www.UserName.Domain.com similar to posterous. I don't even know where to start, I'm guessing PHP forms with some server side scripts and something about wildcards... but thats just what i've turned up after several hours of googling...

I just starting off and not even sure of the best way to ask this question so thanks for you help.

Do you have access to your domain's DNS server? And if so, does your provider support wildcard A or CNAME records? Cos if the answer to either of those is 'No', that's probably the end of the road unfortunately... — DaveRandom, Aug 22 '11 at 22:48
Is this helpful for you? http://stackoverflow.com/questions/183928/how-to-let-php-to-create-subdomain-automatically-for-each-user — vascowhite, Aug 22 '11 at 22:54

score 4 · Accepted Answer · answered Aug 23 '11 at 00:24

First of all, make sure the domain (domain.tld - mydomain.com for example) goes to the folder with your PHP code.

<VirtualHost *:80>
    DocumentRoot "/my/path/"
    ServerName mydomain.com
    ServerAlias mydomain.com
    <Directory "/my/path/">
        allow from all
        Options +Indexes
    </Directory>
</VirtualHost>

Then on the PHP part simply use:

$urlParts = explode('.', $_SERVER['HTTP_HOST']);                                                                    
print_r($urlParts);

If you use: http://www.user.mydomain.com/ you will get:

Array
(
    [0] => www
    [1] => user
    [2] => mydomain
    [3] => com
)

which $urlParts[1] = your username

If you use: http://user.mydomain.com/ you will get:

Array
(
    [0] => user
    [1] => mydomain
    [2] => com
)

which $urlParts[0] = your username

Generate Subdomain From PHP form

1 Answers1