/**
 * Gets a computer by its ip and port.
 * @param $ip string The ip address of the computer.
 * @param $port int The computer's port.
 * @return mixed[] An array of the computer's data.
 */
function getComputerByIp($ip, $port = 80)
{
    $computers = loadComputers();
    foreach ($computers as $computer) {
        if ($computer["ip"] == $ip && $computer["port"] == $port) {
            return $computer;
        }
    }
    return null;
}
<?php

require __DIR__ . "/functions.php";
$computers = loadComputers();
foreach ($computers as $computer) {
    listComputer($computer);
}
includeScript();
includeStyles();