To see whether something is defined, you use the defined function: 
#!/usr/bin/perl

use warnings 'all';
use strict;

sub my_sub {1}

print "my_sub ", defined &my_sub ? "exists\n" : "doesn't exist\n";
print "no_sub ", defined &no_sub ? "exists\n" : "doesn't exist\n";

__END__
my_sub exists
no_sub doesn't exist

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Abigail

In reply to Re: test for subroutine existence by Abigail-II
in thread test for subroutine existence by twerq

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