Explode a resource identifier into its component parts

explode_resource.php

<?php

/**
 * Parses resource identifiers of the format:
 *   RESOURCE=s3://username:password@domain/resource
 */

if ($resource = getenv('RESOURCE')) {
  // strip off the namespace, assume it's not needed (e.g 's3', 'mysql')
	$identifier = explode('://', $resource)[1];
	list($credentials, $resource) = explode('@', $identifier);
	list($username, $password) = explode(':', $credentials);
	list($domain, $relative) = explode('/', $resource);
}