PHP not remembering the IP address of a domain name

Question

System:

• CentOS 7
• PHP-FPM 7.1

Issue:

• PHP resolves local domain name only if it is set for the DHCP server as static address
• The server won't have any connection in the future to the DHCP server, thus it is unable to resolve the IP address of the domain name.

Tried:

• Tried to test if it remembers the ip address if I remove it from the DHCP server (but it still has direct connection to the other server)
• gethostbyname("mylocal.example.com"); comes back with the domain name itself as result
• The domain name is added to the /etc/hosts file. Restarted network since then a few times.

Question:

• How can I burn in PHP to lookup a specific domain name on an specific IP address?

Answer 1

The same domain name is returned by gethostbyname function only when its not able to resolve that host.

To resolve a non-existent domain name from host file add a trailing dot to the domain name. Eg gethostbyname(“mydomain.com.”);