Dynamically generates an Ansible inventory based on your DigitalOcean droplets

doin.php

<?php
####################################
# Dynamic Inventory Build Script 
# usage: php doin.php > inventory
####################################

$DO_API_TOKEN = 'YOUR_DIGITALOCEAN_API_TOKEN';
$GROUP_NAME = 'servers';

$endpoint = "https://api.digitalocean.com/v2/droplets";
$headers[] = "Content-type: application/json";
$headers[] = "Authorization: Bearer $DO_API_TOKEN";

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_HTTPHEADER     => $headers,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_URL            => $endpoint,
]);

$response = json_decode(curl_exec($curl), true);
curl_close($curl);

$hosts = [];

foreach ($response['droplets'] as $droplet) {
	$hosts[] = inventoryHost($droplet['name'], $droplet['networks']['v4'][0]['ip_address']);
}

printInventory($GROUP_NAME, $hosts);

function inventoryHost($alias, $host)
{
	return sprintf("%s ansible_host=%s\n", $alias, $host);
}

function printInventory($groupName, array $hosts)
{
	$inventory = sprintf("[%s]\n", $groupName);
	
	foreach ($hosts as $host) {
		$inventory .= $host;
	}

	$inventory .= sprintf("\n[all:vars]\nansible_python_interpreter=/usr/bin/python3\n");

	echo $inventory;
}