Objects in PHP

[David]

Im using objects in PHP for the first time and have a question about
the following script.

$new_grad = new graduate();
$new_grad->set_fn($_SESSI ON['first_name']);
$new_grad->set_sn($_SESSI ON['surname']);
$new_grad->set_username($ _SESSION['username']);
$new_grad->set_password($ _SESSION['password']);
//etc

The sript is used to set up user accounts when they sign up for my
system.
HOWEVER I am concerned about the following scenario. Say if two or
more users are setting up accounts at roughly the same time.
The first person presses 'submit' so

$new_grad = new graduate();

gets executed.
But if a second or so later another person presses submit the same
line of code will get executed so we will either have two objects with
the same name or the second object will replace the first.
Neither of which is desirable so how could I avoid this?

[Pedro Graca]

Re: Objects in PHP

David wrote:[color=blue]
> The first person presses 'submit' so
>
> $new_grad = new graduate();
>
> gets executed.
> But if a second or so later another person presses submit the same
> line of code will get executed so we will either have two objects with
> the same name or the second object will replace the first.
> Neither of which is desirable so how could I avoid this?[/color]

Each person gets 'his' own php.
Imagine each object name is prefixed with the access id.

For the first person php creates person1.new_gra d
and then for the second it creates person2.new_gra d

When you do <?php $new_grad->save(); ?> it's like you knew which person
was accessing at that time and the same as
<?php $person<whateve r>.new_grad->save(); ?>

In short, don't worry about that :)

It's just the same for objects as for 'normal' variables ... have you
worried about that for 'normal' variables before?
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[David]

Re: Objects in PHP

Thanks a lot, I had a feeling (hoping:-) it was something like that,
just had a sudden panic thats all when I thought everything would
crash due to my lack of knowledge for objects!
[color=blue]
> Each person gets 'his' own php.
> Imagine each object name is prefixed with the access id.
>
> For the first person php creates person1.new_gra d
> and then for the second it creates person2.new_gra d
>
> When you do <?php $new_grad->save(); ?> it's like you knew which person
> was accessing at that time and the same as
> <?php $person<whateve r>.new_grad->save(); ?>
>
> In short, don't worry about that :)
>
> It's just the same for objects as for 'normal' variables ... have you
> worried about that for 'normal' variables before?[/color]

[Alvaro G Vicario]

Re: Objects in PHP

*** David wrote/escribió (8 Jan 2004 08:08:08 -0800):[color=blue]
> But if a second or so later another person presses submit the same
> line of code will get executed so we will either have two objects with
> the same name or the second object will replace the first.
> Neither of which is desirable so how could I avoid this?[/color]

<?
echo $name;
$name='John';
?>

Open several browser Windows and execute the script as many times as you
want. Will you ever get 'John' printed? With objects it's just the same.


--
--
-- Álvaro G. Vicario - Burgos, Spain
--

[Erwin Moller]

Re: Objects in PHP

David wrote:
[color=blue]
> Thanks a lot, I had a feeling (hoping:-) it was something like that,
> just had a sudden panic thats all when I thought everything would
> crash due to my lack of knowledge for objects!
>[/color]

Don't Panic, get the Hitch Hikers Guide To The Galaxy pronto at your local
bookstore.

[Dan Tripp]

OT: Re: Objects in PHP

Erwin Moller wrote:
[color=blue]
> David wrote:
>
>[color=green]
>>Thanks a lot, I had a feeling (hoping:-) it was something like that,
>>just had a sudden panic thats all when I thought everything would
>>crash due to my lack of knowledge for objects!
>>[/color]
>
>
> Don't Panic, get the Hitch Hikers Guide To The Galaxy pronto at your local
> bookstore.[/color]


Don't just get the first book, get the whole series! There's a nice
edition that has all the books bound in one. 'tis cheaper than buying
them individually. =)

Regards,

- Dan

http://www.dantripp.com/