Try something more like this:

#!/usr/bin/perl
use strict;
use warnings;

use 5.012;
# http://perldoc.perl.org/File/Find.html
use File::Find; 
# http://perldoc.perl.org/Getopt/Long.html
use Getopt::Long; 
 
my @locations;
my @fnames;

my $verbose;
my $ignorecase;
GetOptions (
          "location=s"   => \@locations, 
          "filename=s"   => \@fnames,
          "ignorecase"  => \$ignorecase,
          "verbose"  => \$verbose)
or die("Error in command line arguments @ARGV\n");

my $USAGE = "$0 -l <directory> -f <filename> [-v]
example:
$0 -l /var/www/allfiles -f abc122.txt -f 333twom.txt -f 56test.txt -f 
+t445ok.txt
";

die $USAGE unless @fnames;
die $USAGE unless @locations;

my @files;

find({ wanted => \&process, follow => 0, no_chdir => 1 }, @locations);

sub process{
    my $addfile = 0;
    for my $f (@fnames){
        print "Considering '$_' in $f \n" if $verbose;
        if(index($_,$f)>-1){
            ++$addfile;
            last;
        }
    }
    push @files, $File::Find::name if $addfile;
}

use Data::Dumper; 
print Dumper \@files;
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