15 Dec 2001
http://svn.php.net/viewvc/phpdoc/en/trunk/appendices/history.xml?r1=64852&r2=65199&pathrev=314121

PHP succeeds an older product, named PHP/FI. PHP/FI was created by Rasmus Lerdorf in 1995, initially as a simple set of Perl scripts

05 Aug 2011
https://web.archive.org/web/20110807085055/http://www.php.net/manual/en/history.php.php

PHP as it's known today is actually the successor to a product named PHP/FI. Created in 1994 by Rasmus Lerdorf, the very first incarnation of PHP was a simple set of Common Gateway Interface (CGI) binaries written in the C programming language.

20 Jul 2012
https://twitter.com/rasmus/status/226405807305138176

"I wonder why people keep writing that PHP was ever written in Perl. It never was."

In reply to (OT) Revisionist History Lesson by Anonymous Monk

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