PHP gethostbyaddr() Function Usage and Example

PHP HTTP 　Reference Manual

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

Syntax

string gethostbyaddr ( string $ip_address )

Definition and usage

Used to obtain the IP address of the given Internet hostname

Return value

　Returns the hostname if successful; if failed, it outputs the original (outputs the IP address); if the input format is abnormal, it 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 hostname

PHP HTTP 　Reference Manual