PHP | gethostbyaddr() function

The gethostbyaddr() function is an inbuilt function in PHP which returns domain name for a specified IP address.

Syntax:

gethostbyaddr($ip_address);

Parameter: This function accepts one parameter as mentioned above and described below:

• $ip_address: It is required parameter. It specifies IP address whose host name to be found. Passed as a string.

Return Value:

• This function returns hostname on success and IP address on failure.

Note:

• This function is available for PHP 4.0.0 and newer version.

Example

<?php
$host = gethostbyaddr("52.25.109.230");
echo $host;
?>

Output:

ec2-52-25-109-230.us-west-2.compute.amazonaws.com

Reference: https://www.php.net/manual/en/function.gethostbyaddr.php