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Date: Sat, 4 May 2013 20:58:15 +0800
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To: Nikita Popov <nikita.ppv@gmail.com>
Cc: PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Re: [PROPOSAL]Add second to callback of preg_replace_callback
From: laruence@php.net (Laruence)

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On Sat, May 4, 2013 at 8:49 PM, Nikita Popov <nikita.ppv@gmail.com> wrote:

> On Sat, May 4, 2013 at 2:39 PM, Laruence <laruence@php.net> wrote:
>
>> Hey:
>>    Sorry for the delay,  the new patch, which make the second argument the
>> regex array keys is attached.
>>
>>
>>
>> https://bugs.php.net/patch-display.php?bug_id=64730&patch=second_arg_rege_key.patch&revision=latest
>>
>>    with this patch,  preg_replace_callback will call user callback with
>> two
>> arguments, the first one is the same,  the second is the regex key if the
>> regex is an array or NULL if the regex is a string.
>>
>>    then we can do something like:
>>
>>     $code = preg_replace_callback(
>> array(
>> "foo" => "/some very complex regex/",
>> "bar" => "/another one/",
>> ...
>> ),
>> function($matches, $idx)  {
>>  switch ($idx) {
>>   case 'foo'
>>     ...
>>   case 'bar':
>>     ...
>>  }
>> },
>> $code);
>>
>>
>>   if no objections,  I will commit this patch after 5.5. 0 final release..
>>
>>   thanks
>>
>
> I object. If this were using the preg_replace_callback(Array, Array,
> String) syntax [which is not practically possible due to ambiguity], I
> would agree that this is a nice feature which makes the function consistent
> with preg_replace and str_replace. But this implementation with some weird
> additional identifier that you need to switch over makes absolutely no
> sense to me and only complicated the API. Better to just use a loop for
> this.
>
And,  I *DO NOT* think it's weird, it's few choice we got now..

because:

As I said, a loop is inefficient here.


>
> One thing that might be nicer API wise but without ambiguity is an
> preg_replace_callback(['regex' => callback], $string) overload. Though
> personally I'm not really a fan of doing overloads with completely
> different argument types.
>
I don't this this is possible..

thinking of :
$regex  = array(0 => "xxx");

if by accident there is a function call "xxx".

thanks


>
>
> Nikita
>



-- 
Laruence  Xinchen Hui
http://www.laruence.com/

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