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Date: Sun, 13 Jul 2014 16:59:48 +0200
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To: Zeev Suraski <zeev@zend.com>, Andrea Faulds <ajf@ajf.me>
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Subject: Re: [PHP-DEV] [RFC] Scalar Type Hinting With Casts (re-opening)
From: jocelyn.fournier@gmail.com (Jocelyn Fournier)



Le 13/07/2014 16:41, Zeev Suraski a écrit :
>> -----Original Message-----
>> From: Andrea Faulds [mailto:ajf@ajf.me]
>> Sent: Sunday, July 13, 2014 5:34 PM
>> To: Zeev Suraski
>> Cc: Nikita Popov; PHP internals
>> Subject: Re: [PHP-DEV] [RFC] Scalar Type Hinting With Casts (re-opening)
>>
>>
>> On 13 Jul 2014, at 15:31, Zeev Suraski <zeev@zend.com> wrote:
>>
>>> I think this is a big step in the wrong direction to one of the most
>>> common auto-conversion use cases out there (HTTP input variables).
>>> See my note to Nikita...
>>>
>>> This RFC is a huge deal, I suggest we let more people voice their
>>> opinion in before changing it in each direction :)
>>>
>>> Zeev
>>
>> Yes, I might have acted a little too quickly. However, I'm not sure
> "12a" is such
>> a common case. With the strict behaviour, foobar(" 12") and foobar("12")
> still
>> work, however foobar("12 ") unfortunately would not.
>
> I don't think it's a common intentional case, but when writing code
> defensively - you need to be prepared for whatever someone might through
> at you...  Say I have a form that accepts 'age', and I expect users to
> type in their age.  As one that develops the backend, it's great if I can
> simply stick an 'int' in the function signature that deals with this
> $_GET['age'], and know that whatever the user typed in - it would turn it
> to the most sane integer value.  In other words, if someone types in '12a'
> (by mistake or intentionally), I think it's a very sane behavior to just
> treat it as 12, as opposed to forcing me (the developer) to write error
> handling code with a try/catch block, and a fairly hairy try/catch block
> too.  Your example of "12 " (that I didn't even think about before) is an
> even a more likely scenario, but I think there's no strong reason not to
> allow both.

 From my point of view, if the type annotations are doing implicit cast 
(with or without E_NOTICE/E_STRICT warning), they should behave exactly 
the same than an explicit cast. If it behaves differently, I'll be 
really difficult for a developer to guess what will be the PHP behaviour 
with this new syntax.


   Jocelyn