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Posted by gosha bine on 06/02/07 22:42
howa wrote:
> On Jun 2, 7:51 pm, gosha bine <stereof...@gmail.com> wrote:
>> The second. "foo = new Foo" will create two copies of "Foo" in php4.
>>
>
> what do you mean? you mean the second one is preferred?
>
> why the first one will create two copies of "Foo" but not the first
> one?
>
$foo = new Foo
does the following in php4:
1) a chunk of memory is allocated and object's constructor is called to
initialize this memory
2) another chunk of memory is allocated and everything from the first
chunk is copied to it
3) variable 'foo' is being set to address of this second chunk
4) the first chunk is being disposed.
Apart from being ineffective, this technique will apparently fail if an
object saves reference to itself ($this) in constructor or when you need
exactly one instance.
>
>> Any reason why you can't use php5?
>>
>
> php4 is stable, and its OOP function is enough (and simple) as far as
> known.
>
I agree that OO "features" of php5 are mostly useless and php4 has
everything one needs to write OO programs. However, I still won't
recommend it, exactly for the reason described above.
--
gosha bine
extended php parser ~ http://code.google.com/p/pihipi
blok ~ http://www.tagarga.com/blok
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