Method of using PHP to obtain client server IP

<?php

echo "The hostname of the current scripting server:". gethostbyaddr ($_server[' remote_addr '). " <br/> 
Run out:
Host name of the current script server: xyl-pc
Get the IP address of the server that is currently running the PHP script (page): 127.0.0.1
Gets the host name of the server on which the PHP script (page) is currently running: localhost
Client ip127.0.0.1
Client ip127.0.0.1
Server Host ip61.135.169.105