[nycphp-talk] PHP-related book comments
John Lacey
jlacey at att.net
Tue Jul 13 18:05:52 EDT 2004
Mitch Pirtle wrote:
>
> I don't know a more secure scripting language than python ...
care to elaborate?
>From hans not junk at nyphp.com Tue Jul 13 18:12:05 2004
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Subject: RE: [nycphp-talk] PHP Scales, Our Chris Shiflett gets /.'d
Date: Tue, 13 Jul 2004 15:12:02 -0700
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> I thought that's what scalability means. Being able
> adapt to change.
>=20
> "How well a solution to some problem will work when
> the size of the problem increases"
Yeah, but that change is generally an increase in requests/second and
that problem is generally getting more and more users on your website.
Scalability or the ability to scale can mean many different things. In
the web world, it generally reflects the ability of an application to
take on more and more load while maintaining a consistent level of
performance, responsiveness, reliability, and stability. To do this, an
application has to be able to be distributed across multiple physical
servers.
For example, any piece of hardware - running any application - will
eventually become useless if a big enough load is put on it. The
ability to scale is the ability to add additional hardware to distribute
the load across, without making significant changes to the application's
architecture each time a new server comes online. The more hardware,
the more load your application can handle. So you add one piece of new
hardware, and you can handle twice as much load as before - this is a
linear scale.
The ability to do this is really an architectural issue, which is why
Shiflett is exactly right. It has less to do with your programming
language, database, or OS, than it does with your application's design.
Good design =3D=3D scalable
Bad design !=3D scalable
So why do so many people consider Java to scale? Because this "good
design" and architecture is built into the language itself. In other
words, Java (really, J2EE) has mechanisms for adding new servers and
sharing load and data between these new servers transparently (or, at
least that's the intent). This allows new hardware to easily be added
indefinitely, thus handling increased load indefinitely, and thus scale.
Or so that's the theory.
H
>From hans not junk at nyphp.com Tue Jul 13 18:15:07 2004
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Subject: RE: [nycphp-talk] PHP-related book comments
Date: Tue, 13 Jul 2004 15:15:00 -0700
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> > But I know what he's getting at, and he's right... register_globals
(as
> > we all know :) was a bad idea. True, it's still possible to write
> > secure code with it on, but by having it enabled, a world of
> > inexperienced people could throw sloppy code together and have it
> > magically "work."
> >
> > In fact, PHP has had several of these bad ideas (directives with the
> > word "magic" in them come to mind).
>=20
> Blame Rasmus. AFAIK, all (almost all?) of those directives date back
> to PHP/FI days.
>=20
> But it's unfair to project back 2004 (or even 2001) realities upon
> 1996.
>=20
> Different sets of programmers used PHP back then, the Web was a
> very different place, and PHP was just a quick and dirty language for
> guest books, hit counters, and e-mailing forms.
Agreed 100%. There was a time when sendmail defaulted as an open relay
for convenience :)
H
>From hans not junk at nyphp.com Tue Jul 13 18:16:29 2004
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Subject: RE: [nycphp-talk] custom controls to represent DB relationships
Date: Tue, 13 Jul 2004 15:16:26 -0700
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From: "Hans Zaunere" <hans not junk at nyphp.com>
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> I'm looking for examples of "more advanced" page controls that people
have
> developed to represent one to many and/or many to many DB
relationships on a
> web page, using PHP, JS and CSS. The purpose of these controls is to
> allow uses to execute "mass" actions on data, such as deleting a group
of
> records at once, or reassigning several records to a different
category.
> Any thoughts, suggestions and examples would be greatly appreciated!
Not sure I understand 100% - you mean transactions? Foreign key
constraints? It sounds more like SQL level stuff, rather than something
at a JS/CSS or even PHP level.
H
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