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Just to add my 2c, I am currently trying to migrate a legacy PHP4
application to PHP5, and one of the huge hurdles is a set of classes
representing a group of tasks, each class having a method called try().
These classes are used in over 100,000 lines of other code.
It seems to me like an artificial limitation (i.e. it should be simple
to tell which sense the keyword is meant in), but I'd like to hear from
a developer on it.
Jasper
Ralph Schindler wrote:
> Precisely. The point I was trying to make is that there should be fewer
> restrictions on method names of classes so that developers that are
> maintaining some distributable classes can keep the API clean. I've
> found myself in a situation where instead of using a method call
> isset(), I must use something like has().. and instead of unset(), I use
> remove(). All the while, when I overload the __isset() and __unset()
> methods, they actually forward the request to has() and remove().
>
> I can think of several classes where the common sense method is a keyword:
>
> $session->isset($variable);
> $session->unset($variable);
> $trash->empty();
> $long_hallway->echo();
> $stage->exit();
> $baseball_player->catch();
> $baseball_player->throw();
> $game_of_life_member->die();
> $wood->break();
> $vegetarian->food->steak->try();
> $lawyer->case->try(); // double fault ;)
>
> Now I'm getting silly, but that was what my point was ;)
>
> -ralph
>
>
>
> Jochem Maas wrote:
>> Antony, I believe Ralph was using isset() and unset() purely
>> as arbitrary examples, e.g:
>>
>> class TestReservedKeywordMethods
>> {
>> function unset() { echo "unset<br />"; }
>> function echo() { echo "echo<br />"; }
>> function empty() { echo "empty<br />"; }
>> }
>>
>> $test = new TestReservedKeywordMethods();
>> $test->unset();
>> $test->echo();
>> $test->empty();
>>
>> PS: the underlying example does work, which gives me the feeling that
>> it not so much an architechural limitation but rather a performance issue
>> with regard to doing extra checks as to the context of an encoutered
>> T_UNSET (for example) to determine whether it's okay, but I'm guessing
>> really - (and it's probably is not exactly what Ralph is looking for):
>>
>> class TestReservedKeywordMethods
>> {
>> function __call($m) { echo "$m<br />"; }
>> }
>>
>> $test = new TestReservedKeywordMethods();
>> $test->unset();
>> $test->echo();
>> $test->empty();
>>
>>
>>
>> Antony Dovgal wrote:
>>>
>>> __isset() and __unset() methods are what you're looking for.
>>> They are available since 5.1.0.
>>>
>>> See http://www.php.net/manual/en/language.oop5.overloading.php
>>>
>>> On 10.05.2006 21:28, Ralph Schindler wrote:
>>>
>>>> Architectural restrictions aside, is it far off to ask if something
>>>> like this could be possible in PHP6:
>>>>
>>>> <?
>>>>
>>>> class TestReservedKeywordMethods
>>>> {
>>>> public $value = "2";
>>>>
>>>> public function isset()
>>>> {
>>>> if (is_null($this->value))
>>>> return false;
>>>> else
>>>> return true;
>>>> }
>>>>
>>>> public function unset()
>>>> {
>>>> $this->value = 0;
>>>> }
>>>>
>>>> }
>>>>
>>>> $test = new TestReservedKeywordMethods();
>>>> $test->isset();
>>>> $test->unset();
>>>>
>>>> ?>
>>>>
>>>
>>>
>>
>>
>
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