in reply to XML::Simple oddness

mod_perl caches your Perl scripts when it runs them; this provides a nice efficiency boost, but it also has a few extra gotchas.

You have to be very careful to initialize all your variables before you use them. Additionally, you must avoid my variables that are used both inside and outside of subroutines.

Failing either one of those could lead to a variable holding a value that it got from a previous execution of the mod_perl script.

How is $r declared and set in your code?

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Re: Re: XML::Simple oddness
by lindex (Friar) on May 16, 2001 at 07:12 UTC

    That code was not cut and paste, I am aware of how scope works inside mod_perl $r was just an example of a Apache::Request object and is defined correctly.

    I am almost sure that this problem is not coming from my code, considering that I am using XML::Simple in the same way outside of mod_perl and it works correctly

    p.s. yes everything is defined with a my()


    lindex
[reply]
      Woops... Not sure why I focused on $r, which shouldn't be related to the problem here. Sorry. :)

      All of your variables are declared with my... Are any of the variables declared outside of a subroutine, and then used inside a subroutine? 

      my $var = rand;

sub do_something {
  print "$var\n";
}

      [download]
      That will lead to the 'Variable "$var" will not stay shared' error, and $var in do_something will keep the same value it had the first time do_something was called, including previous calls from earlier executions of the script in the same mod_perl fork.

      Since the behavior is different under mod_perl, my first thought is to check on the differences between running normally and running under mod_perl... If that's not it, I'll work on thinking of other possible causes for this odd behavior. Although at that point you may want someone with more experience with the XML modules. :)

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