An HTTP server that prints back your request in PHP. Put this file in a folder, open a terminal in the folder and type: "php -S localhost:979"` and whizz bang pow! You'll have a server you can use to test your requests!

index.php

<?php

# Inspired by https://stackoverflow.com/a/49007601
function stdout($arg) {
  if (is_object($arg) || is_array($arg) || is_resource($arg)) {
    $output = print_r($arg, true);
  } else {
    $output = (string) $arg;
  }
  file_put_contents('php://stdout', $output . \PHP_EOL);
}

stdout('Look Sharp! Request Received!');
stdout($_SERVER);
stdout(getallheaders());
$headers = getallheaders();
if ($headers['Content-Type'] == 'application/json') {
    stdout(json_encode(json_decode(file_get_contents('php://input')), JSON_PRETTY_PRINT));
} else {
    stdout(file_get_contents('php://input'));
}