When we ping a URL address type www.google.com the prompt returns us the IP 172.217.30.4, now I would like to know how to get the URL address only with the IP number through PHP, preferably. Thanks in advance for your understanding.
How to view DNS domain only with IP number?
1
asked by anonymous 06.01.2018 / 21:26
1 answer
2
What you are describing is a Reverse DNS Lookup .
In PHP you can use the gethostbyaddr function to resolve names through an ip. This does not mean that you will get the main domain from an ip.
<?php
echo gethostbyaddr("172.217.30.4"); // rio01s23-in-f4.1e100.net
?>
A lookup is required at DNS Records for this information (A, CNAME, PTR, and so on). For this there is the dns_get_record function:
<?php
echo var_dump(dns_get_record("google.com"));
?>
06.01.2018 / 23:00