Lerdorf talks about security with Joomla! developers at OSCMS 2007 Conference. Rasmus Lerdorf (Danish: [ˈleɐ̯ˌtɒˀf]; born 22 November 1968) is a Danish-Canadian[1] programmer. He co-authored and inspired the PHP scripting language, authoring the first two versions of the language and participating in the development of later versions led by a group of developers including Jim Winstead (who later c