Fatal error phpwiki-1.2.10

I'm trying to do a zipdump in 1.2.10 so I can upgrade to 1.5.2 but I
keep encountering this error:

Fatal error: Call to undefined function import_request_variables()
in /home/www/html/old-phpwiki/lib/config.php on line 10

I see several php files reference the above function but I don't see
where it's defined.

What am I missing?

php5-5.6.3
apache2-2.2.22
mariadb 10.0.3
phpwiki-1.2.10

jd


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