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To: Steph Fox <steph@zend.com>
Cc: Rasmus Lerdorf <rasmus@lerdorf.com>,
	internals <internals@lists.php.net>
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Subject: script upgrading program was Re: [PHP-DEV] Re: Summer of Code
From: lsmith@php.net (Lukas Smith)

Steph Fox wrote:
> Is it a really stupid idea to suggest a script upgrading program a la 
> 'autoupdate' (for 4/5 -> 6)?
> 
> It's something I hoped to tackle myself, but am unlikely to find the 
> time for.

Well if it works it could solve some issues. Like handling stupid BC 
breaks (array_merge, class_exists), exploit new features (parsing phpdoc 
to set PPP) and generally make the code a happy E_STRICT camper.

The potential for breakage is huge though (take the PPP example ..) and 
also for code library it would mean that users will report all sorts of 
suprising bugs (unless you test the code in all its variations).

So maybe as a one time migration tool it could make a nice addition to 
PHP_Compat (implements new functions/constants etc in userland) and 
PHP_CompatInfo (determines the minimal php version).

regards,
Lukas