That section appears to have undergone a number of changes over the years but this one on the 8th of September 2004 is an early one. However, this was swiftly re-edited later that same day to read

PHP was originally designed as a small set of Perl scripts, followed by a rewritten set of CGI binaries written in C by Rasmus Lerdorf in 1994

So it seems there has been confusion among PHPers for quite some time as to their origin.