NYCPHP Meetup

[Matthew Terenzio]

On Oct 9, 2004, at 7:57 AM, Dan Cech wrote:

> Matthew Terenzio wrote:
>> What a weird subject line. Is it an OOP or procedural question?
>> What I mean is. . .
>> Well, suppose you have a User class and  a register() function in the 
>> class.
>> Then on a given script/page you are looping through some values and 
>> you want to create a new User and register it every time through the 
>> loop.
>> Of course it doesn't work because you can't do something like:
>> $name = new User;
>> more than once.
>
> Actually, this will work just fine.

Fair enough. But say you have this situation.

function doSomething() {
$obj = new object;
$obj-> doing something
other things happening
$obj->destruct;
}

what happens if the script calls doSomething a second time before $obj 
is done. Am I in some danger of overwriting $obj before I'm through 
using the previous instance?
if not, Is the same true if the instantiation happens outside of a 
function?

I guess the distilled question is:

When the engine instantiates a new object, is the memory allocated to 
that object unique, both from within a given script and across multiple 
scripts, if indeed that object is passed around an application?





>
>> 1) Do most people use dynamically named variables?
>
> Very rarely, it's generally clearer to use an array if you want to 
> keep the variable for later, or just unset/reuse it.
>
> ie:
>
> $users = array();
> foreach ($signups as $id => $signup) {
>   $users[$id] = new User();
>   $users[$id]->register();
> }
>
> or:
>
> foreach ($signups as $signup) {
>   $user = new User();
>   $user->register();
>   unset($user);
> }
>
> the call to unset is optional, if you leave it out the variable $user 
> will be overwritten on each iteration through the loop.
>
> Dan
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