Function iso8601Date

Formats a date/time according to ISO 8601.

Example: YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00)

Package: Module\ContentSitemapXml
Copyright: four for business AG
Author: simon.sprankel@4fb.de
Author: marcus.gnass@4fb.de
Located at data/examples/data/modules/content_sitemap_xml/php/content_sitemap_xml_output.php

Parameters summary
`integer`	`$time`	a UNIX timestamp

Return value summary
`string`	the formatted date string