Unable bind for the same port in PHP server socket programming -

i trying bind socket same port, getting error.

socket_bind(): unable bind address [0]: 1 usage of each socket address (protocol/network address/port) permitted. in c:\xampp\htdocs\my\server.php on line 79 not bind socket

here 79-th line:

$result = socket_bind($socket, $host, $port) or die("could not bind socket\n"); 

how fix this?

i trying bind socket same port

use different port or kill application bound port trying bind to. speaking 1 application can bound port @ time.

netstat -o used find ports in use via cmd in windows.