Hetzner Robot Ansible inventory script

hetzner_inventory_ansible.php

#!/usr/bin/php
<?php
	define('HETZNER_KEY_PATH', '/root/.hetzner_robot_key');
	if (!file_exists(HETZNER_KEY_PATH)) die('Key file at '.HETZNER_KEY_PATH.' not found'.PHP_EOL);

	$hetzner_key = file_get_contents(HETZNER_KEY_PATH);
	if (!strpos($hetzner_key, ':')) die('Key file must be of format "username:password"'.PHP_EOL);

	$process = curl_init('https://robot-ws.your-server.de/server');
	curl_setopt($process, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
	curl_setopt($process, CURLOPT_USERPWD, $hetzner_key);
	curl_setopt($process, CURLOPT_RETURNTRANSFER, TRUE);
	$return = curl_exec($process);
	curl_close($process);

	$servers = json_decode($return);
	$inventory = [];

	foreach ($servers as $server)
	{
		$inventory[$server->server->server_name] = [$server->server->server_ip];
	}

	echo json_encode($inventory, JSON_PRETTY_PRINT);