Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
How do I check if the URL accessing the page is the original URL or if it’s a CNAME record.
For example, I have a site domain.com. Users can setup a CNAME where they link www.otherdomain.com to our site domain.com.
From our server point of view, how can I detect if the URL accessing the page is the actual one (domain.com) or the CNAME one (www.otherdomain.com)?
I think you have to query a DNS to know it, since this information does not usually come in request headers.
Take a look at the dns_get_record and checkdnsrr functions in PHP documentation.