Sending Proby notifications using PHP

proby.php

<?php

$PROBY_API_KEY = 'secret';

function do_post_request($url, $data, $headers) {
  $postdata = http_build_query($data);
  
  $header_string = "";
  foreach ($headers as $key => $value) {
    $header_string .= $key . ": " . $value . "\n";
  }
  
  $opts = array(
    'http' => array(
      'method'  => 'POST',
      'header'  => $header_string,
      'content' => $postdata
    )
  );

  $context  = stream_context_create($opts);
  $result = file_get_contents($url, false, $context);
}

function proby_send_start_notification($task_id) {
  do_post_request("https://proby.signalhq.com/api/v1/tasks/$task_id/start.json",
                  null,
                  array('Content-Type' => 'application/json', 'api_key' => $GLOBALS['PROBY_API_KEY']));
}

function proby_send_finish_notification($task_id) {
  do_post_request("https://proby.signalhq.com/api/v1/tasks/$task_id/finish.json",
                  null,
                  array('Content-Type' => 'application/json', 'api_key' => $GLOBALS['PROBY_API_KEY']));
}

proby_send_start_notification("your_task_id");
sleep(5);
proby_send_finish_notification("your_task_id");

?>