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Re: Re^2: PHP (and Perl) at Yahoo!

by Ovid (Cardinal)
on Oct 29, 2002 at 22:55 UTC ( #208908=note: print w/ replies, xml ) Need Help??


in reply to Re^2: PHP (and Perl) at Yahoo!
in thread PHP (and Perl) at Yahoo!

That sounds reasonable, but this is part of some slightly different functionality that is designed to work specifically with our current Template Toolkit setup here at work. Data::FormValidator appears nice, but I felt that a small, custom-designed tool that is a drop-in replacement for our code was the way to go. My first chance to use this took a 450 line program and reduced it down to 150 lines. No changes to our templates were required. Further, Data::FormValidator makes no reference to untainting the data.

Don't get me wrong, Data::FormValidator looks great, but it didn't appear to quite be what I need. Subclassing it might have been an option, but it makes internal function calls rather than method calls and that can make subclassing a pain because I would have to reimplement the functions rather than inherit them. The code below demonstrates the problem.

#!/usr/bin/perl -w use strict; use Data::Dumper; package Foo; sub new { my $class = shift; bless {}, $class; } sub foobared { my $self = shift; $self->{foo} = _test( 3 ); } sub _test { shift } package Bar; @Bar::ISA = 'Foo'; sub foobared { my $self = shift; $self->{foo} = $self->_test( 3 ); } package Main; my $o = Foo->new; $o->foobared; print $o->{foo},$/; my $o2 = Bar->new; $o2->foobared; print $o2->{foo};

As you can see, mixing regular functions with methods doesn't work. You can't inherit because you have an extra argument.

Cheers,
Ovid

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Comment on Re: Re^2: PHP (and Perl) at Yahoo!
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Re^4: PHP (and Perl) at Yahoo!
by Aristotle (Chancellor) on Oct 29, 2002 at 23:01 UTC
    Oh, I meant that as in writing a patch to Data::FormValidator, not subclassing just for your own perusal. :-) I like that module a lot but I believe it needs this feature to be really complete.

    Makeshifts last the longest.

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