You have several errors.
  • You must read the file (not just open it). Use <$fh>.
  • You must slurp the entire file (not just read the first record). Use undef $/.
  • You must not declare %hash1 as a lexical variable within the eval. (The eval string is treated as a block)
  • Under strict, you must declare %hash1 in your program. 
    • #tiny.pl
#!/home/utils/perl5/perlbrew/perls/5.24.2-021/bin/perl

use strict;
use warnings;
use Path::Tiny qw( path );
use Data::Dumper;

#my $file = 'file.pl';
my $file = \<<'file_end';   # Simulate disc file for post
%hash1 = (hello => 1,
          hi =>2   );
file_end


my %hash1;
open(my $fh, '<', $file) or die "Could not open file $file";
local undef $/;
eval( <$fh> );
close $fh;


print Dumper(\%hash1);


>perl tiny.pl
$VAR1 = {
          'hi' => 2,
          'hello' => 1
        };

    [download]
    Bill

    In reply to Re: Reading a hash structure stored in a file by BillKSmith
    in thread Reading a hash structure stored in a file by sam1990

    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.