Well, to get the gest of I I'll post the entire yabb.pl file. You can see my small require "test.pl" in there. 
test.pl
-----------------------------
sub thisisatest
{
print "username is $username";

}

1;

[download]
main script (look for ################### for my code)
----------------------------
#!/usr/bin/perl --

if ($action eq 'detailedversion') { return 1; }

# Make sure the module path is present
# Some servers need all the subdirs in @INC too.
push(@INC, "./Modules");
push(@INC, "./Modules/Upload");
push(@INC, "./Modules/Digest");

if ($ENV{'SERVER_SOFTWARE'} =~ /IIS/) {
    $yyIIS = 1;
    $0 =~ m~(.*)(\\|/)~;
    $yypath = $1;
    $yypath =~ s~\\~/~g;
    chdir($yypath);
    push(@INC, $yypath);
}

# Check for Time::HiRes
#eval { require Time::HiRes; import Time::HiRes qw(time); };
#if ($@) { $START_TIME = 0; }
#else { $START_TIME = time; }

### Requirements and Errors ###
$script_root = $ENV{'SCRIPT_FILENAME'};
$script_root =~ s/\/YaBB\.(pl|cgi)//ig;

if (-e "Paths.pl") { require "Paths.pl"; }
elsif (-e "$script_root/Paths.pl") { require "$script_root/Paths.pl"; 
+}

require "$vardir/Settings.pl";
require "$vardir/advsettings.txt";
require "$vardir/secsettings.txt";
require "$vardir/membergroups.txt";
require "$sourcedir/Subs.pl";
require "$sourcedir/DateTime.pl";
require "$sourcedir/Load.pl";
#require "test.pl";

# Those who write software only for pay should go hurt some other fiel
+d.
# - Erik Naggum

&LoadCookie;          # Load the user's cookie (or set to guest)
&LoadUserSettings;    # Load user settings
&WhatTemplate;        # Figure out which template to be using.
&WhatLanguage;        # Figure out which language file we should be us
+ing! :D

#################################################
#below
#################################################
require "test.pl";
&thisisatest;

#################################################
# end
#################################################

[download]

In reply to Re^2: required files by Anonymous Monk
in thread required files by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.