I am trying to understand the correct way to define
variables and their scope.
Here are two simple PERL ( test1.pl and test2.pl
)scripts. test1.pl work fine, while test2.pl does not.
Would appreciate any help in understanding why
test2.pl is complaining about "Global symbols"
Thanks
PN
test1.pl
========
#!/usr/bin/perl -w
use strict;
my $user = $ENV{USER};
my $test = "Perl";
print " User : $user\n";
print " Test : $test\n";
test2.pl
========
#!/usr/bin/perl -w
use strict;
$user = $ENV{USER};
$test = "Perl";
print " User : $user\n";
print " Test : $test\n";
The only difference in code is this:
In test1.pl, the variables are defined using "my",
while in test2.pl, the variables are defined without
use of the keyword "my".
Here are the results of my attempts at running the
scripts :
% perl -c test1.pl
test.pl syntax OK
% perl -c test2.plperl -c test2.pl
Global symbol "user" requires explicit package name at
test2.pl line 5.
Global symbol "test" requires explicit package name at
test2.pl line 6.
Variable "$user" is not imported at test2.pl line 8.
Global symbol "user" requires explicit package name at
test2.pl line 8.
Variable "$test" is not imported at test2.pl line 9.
Global symbol "test" requires explicit package name at
test2.pl line 9.
test2.pl had compilation errors.
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