Linus Torvalds released the Linux kernel on 5th October 1991. Linux is a free Unix-like operating system created by Torvalds.
FYI, the original name of the O.S. was Freax. It was changed to Linux by Ari Lemmke without consulting Linus Torvalds.
Several popular Content Management Systems (CMS) have been written in PHP - WordPress, Joomla, Drupal, to name a few. [more...]