The variable $files isn't lexical. foreach (and for) uses $_ by default, but if you specify a variable name before the list, it's roughly equivalent to

foreach (@files)
{
  $files = $_;
  #etc...

[download]

Actually, not even roughly! The loop variable is an alias to each element of the list processed by the for loop so indicating an equivalence using assignment is quite misleading.

The OP should note that a for loop variable is magical and is only valid within the scope of the loop. A same named variable outside the loop, even if declared as a lexical variable using my, is a different animal to the loop variable. Consider:

use strict;
use warnings;

my $var = 42;

print "before: $var\n";

for $var (1 .. 10) {
    print "$var ";
}

print "\nafter: $var\n";

[download]

Prints:

before: 42
1 2 3 4 5 6 7 8 9 10 
after: 42

[download]
True laziness is hard work

In reply to Re^2: Global symbol .... requires explicit package name at by GrandFather
in thread Global symbol .... requires explicit package name at by ZETZ

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