Like ar0n said, if you want to pass an array, you should do it later, as all args are put in @_ together.

Other notes:

• This won't pass strict. Your variables in the subroutine should probably be 'my', and if you really want your arrays global, declare them as such. Read what davorg has to say on using these in example code.
• You're only passing two arguments to your sub, but you're trying to get three out of @_, but it doesn't look as if the first arg of @AllFileDetails is really meant to be $text.
• Put quotes around the string you're sending to the function if you want it preserved.

Example:

   use strict;

   use vars qw(@AllFileDetails);  # I'm using 5.005_03

   $AllFileDetails[0] = "blah, blah, blah";
   $AllFileDetails[1] = "foo, bar, diddledum";

   print "Printing array.\n";

   print @AllFileDetails;

   print "\nCalling subroutine now\n";

   &WriteToDisk("files.txt", @AllFileDetails);

   exit;   sub WriteToDisk
   {
           my ($writefile, @arraytowrite) = @_;
       # Thanks to davorg for pointing out that I was
       # only getting part of the array with my earlier
           # code! *blush*

           print "\nInside the subroutine 'WriteToDisk' now.\n";

           print "writefile = $writefile\n";
           print @arraytowrite;
           print "\n";
  
   }
[download]

The above was called with perl -w.

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