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, returns the original output (output IP address); if the input format is abnormal, returns FALSE.

Parameter

Online Examples

Try the following examples

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

The example above returns the result of the hostname

PHP HTTP Reference Manual