Usage and example of PHP gethostbyaddr() function

PHP HTTP 　reference manual

The gethostbyaddr() function retrieves the host name corresponding to the specified IP address.

Syntax

string gethostbyaddr ( string $ip_address )

Definition and usage

Used to obtain the IP address for the given Internet host name

Return value

　Returns the host name if successful; if failed, returns the original output (output IP address); if the input format is abnormal, returns FALSE.

Parameter

Online example

Try the following example

<?php
　　　$hostname　=　gethostbyaddr($_SERVER['REMOTE_ADDR']);
　　　
　　　echo　$hostname;
?>

The example above returns the result of the host name

PHP HTTP 　reference manual