...from Windows and Linux to "C" and Unix. Where did it originate? PHP was created in the mid-1990s by RasmusLerdorf, who wanted to maintain his Personal Home Page but was not quite happy with Perl. PHP's fortunes were transformed...
http://www.computerweekly.com/Articles/2008/12/02/233670/hot-skills-php.htm
...development of PHP started in 1995: RasmusLerdorf created a personal collection...More than two years later, RasmusLerdorf published a more advanced version...applications. They co-operated with RasmusLerdorf and changed the meaning of PHP to...
https://static-zend.pantherssl.com/topics/overview_on_php.pdf