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Request #17900 Unset() for function and class namespace
Submitted: 2002-06-21 10:51 UTC Modified: 2015-12-25 12:46 UTC
Votes:8
Avg. Score:4.4 ± 0.9
Reproduced:5 of 5 (100.0%)
Same Version:0 (0.0%)
Same OS:2 (40.0%)
From: Sky at quit-clan dot de Assigned: cmb (profile)
Status: Closed Package: *General Issues
PHP Version: 4.2.1 OS: Any
Private report: No CVE-ID: None
View Developer Edit
 [2002-06-21 10:51 UTC] Sky at quit-clan dot de 
This is another Feature request for special script parsing:

Currently there is the possibility to unset() variables.

But i want the option to clear the function/class namespace, too. A call like

unfunction('foobar');

sould make a redefine of function foobar() in eval()'d code possible, for example. Same thing for classes.

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 [2002-06-21 10:53 UTC] derick@php.net 
uhm? this sounds like a VERY bad idea to me... and very clumsy programming.
 [2002-06-21 11:08 UTC] Sky at quit-clan dot de 
ok, i got answers like this a thousand times.

i am using php to write a console script. it should be able to dynamically load "modules" like DLLs under windows. These modules are, of course, coded in php and contain classes.

the first time when such a module is executed by "eval" all classes in it are defined in class namespace, everything is fine.

now i want to unload the module - who would i undefine it's class?
even if i didn't use classes - functions can't be undefined, either.

any other suggestions of how to implement a "DLL" like system? the only solution i can think of was encapsulating a general module in an class, instanciating it for every module i load, and call it's functions by the objects interface. but this will disable me from directly calling methods in my module...

i know this sounds weird, but php is such a flexible language, it should be able to load functions/objects dynamically!! this would be great.
 [2002-06-21 12:17 UTC] mfischer@php.net 
I think you should bring this up on the engine2@lists.php.net . In the past I had also the same reasons for it (dynamic remote code updating with PHP-GTK, etc.) but this won't be implemented just because of a few feature requests.

I think the main problem is that "making it work" far exceeds the benefits over the time it takes to implement so we'll just have to forget it (imho).

Suspending.
 [2002-06-21 12:17 UTC] mfischer@php.net 
It's engine2@lists.zend.com , sorry
 [2009-07-19 19:01 UTC] clairaudiant at gmail dot com 
couldn't you loop through the $classarray and unset each $key => $value 
of the array?

foreach ( $class as $key => $value ) {
 unset($class[$key])
}

that should fully obliterate reference to the class.  i think
 [2015-12-25 12:46 UTC] cmb@php.net
-Status: Suspended +Status: Closed -Package: Feature/Change Request +Package: *General Issues -Assigned To: +Assigned To: cmb
 [2015-12-25 12:46 UTC] cmb@php.net 
The runkit extension[1] provides respective features, so I'm
closing this request.

[1] <http://php.net/manual/en/book.runkit.php>
 
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