Raspberry control

control.php

<?php
header('Content-Type: application/json');

$kodi_param = $_GET['kodi'];
$hdmi_param = $_GET['hdmi'];
$result = [];

$kodi_set = isset($kodi_param);
$hdmi_set = isset($hdmi_param);

if ($kodi_set && $hdmi_set) {
  $result["code"] = 400;
  echo json_encode($result);
  return;
}

if ($kodi_set) {

  if ($kodi_param !== "off" && $kodi_param !== "on") {
    $result["code"] = 400;
    echo json_encode($result);
    return;
  }

  if ($kodi_param === "off") {
    exec('sudo /usr/bin/systemctl stop kodi.service', $output);
  } else {
    exec('sudo /usr/bin/systemctl start kodi.service', $output);
  }

  unset($output);
  $output = [];

  exec('sudo /usr/bin/systemctl status kodi.service', $output);

  if ($kodi_param === "off" && strpos($output[2], 'inactive')) {
    $result["code"] = 200;
  } else if ($kodi_param === "on" && strpos($output[2], 'active')) {
    $result["code"] = 200;
  } else {
    $result["code"] = 500;
  }
  echo json_encode($result);
}

if ($hdmi_set) {
  if ($hdmi_param !== "off" && $hdmi_param !== "on") {
    $result["code"] = 400;
    echo json_encode($result);
    return;
  }

  if ($hdmi_param === "off") {
    exec('/opt/vc/bin/tvservice -o', $output);
  } else {
    exec('/opt/vc/bin/tvservice -p', $output);
  }

  unset($output);
  $output = [];
  exec('/opt/vc/bin/tvservice -s', $output);

  if ($hdmi_param === "off" && strpos($output[0], 'off')) {
    $result["code"] = 200;
  } else if ($hdmi_param === "on" && !strpos($output[0], 'off')) {
    $result["code"] = 200;
  } else {
    $result["code"] = 500;
  }

  echo json_encode($result);
}