In my platform, each user has their own config file. The file is named by the subdomain they created.
user1.domain.com user2.domain.com user3.domain.com
The system reads the url via $_SERVER['SERVER_NAME'] and grabs the subdomain. It then looks up the appropriate config file based off of the subdomain.
if the url is user1.domain.com the system looks up user1.config.php.
Each users has the option to use there own domain. I am currently doing this by pointing the A record.
user 1 points theirDomainName.com to my IP address via their A record
how can I use htaccess so the url reads
theirDomainName.com but backend of the platform (php) reads
user1.domain.com thus the platform knows to pull the