Remote Control

poll.php

<?php
$APC_KEY = "remote_command";
$now = time();
$msec = 0;
$success = false;
while (!$success && $msec < 20000) {
    $command = apc_fetch($APC_KEY, $success);
    usleep(1000);
    $msec ++;
}
apc_delete($APC_KEY);
header("Content-type: application/json");
echo json_encode([
    "command" => $command,
    "status" => http_response_code()
]);

send.php

<?php
$APC_KEY = "remote_command";
$command = $_REQUEST['command'];
if (!$command)
    http_response_code(400);
apc_delete($APC_KEY);
if (!apc_add($APC_KEY, $command, 1))
    http_response_code(500);
header("Content-type: application/json");
echo json_encode([
    "command" => $command,
    "status" => http_response_code()
]);