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PHP | gethostbyaddr() function
  • Last Updated : 29 Aug, 2019

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

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