You can migrate only till Symfony 1.3, Symfony 1.4 has a lot of
backwards compatibility code removed
so your application probably will not work.
The procedure is to migrate step by step to 1.1, 1.2, 1.3 and check
what the migration script tells you on each stage.
If you want to go directly to 1.4 you will probably have to do a
complete rewrite of the code.
Regarding PHP version, I think you mean 5.2.6  which is fine, i
recommend latest 5.3.x if you can have it.
Symfony 1.4 has a lot of cleanups and improvements all over the
codebase.

If you are satisfied with how your application works under Symfony
1.0.x you should stick with it cause the upgrade/rewrite may
be a lot of effort.

    gabriel


On Oct 23, 2:22 pm, madhur garg <[email protected]> wrote:
> hi,
>
> We are using symfony 1.0 in my website. Now we are planning to move to
> 1.4.
> we are using php 2.6
>
> Can you please suggest me the procedure to move to 1.4 and what are
> the benefits of moving to 1.4
> Also please tell me the prons and cons of using doctrine and how to
> use doctrine
>
> Thanks,
> Madhur

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