Re: Mixed return type - boolean and array/resource/closure or object
| From: | Sebastian Krebs | Date: | Wed, 05 Mar 2014 09:24:23 +0000 |
| Subject: | Re: Mixed return type - boolean and array/resource/closure or object | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-323033@lists.php.net to get a copy of this message | ||
2014-03-05 9:52 GMT+01:00 Robert Stoll <php@tutteli.ch>:
>
>
> From: Sebastian Krebs [mailto:krebs.seb@gmail.com]
> Sent: Wednesday, March 05, 2014 3:18 AM
> To: Robert Stoll
> Cc: PHP General List
> Subject: Re: [PHP] Mixed return type - boolean and array/resource/closure
> or object
>
> > Some array functions like "current", "array_pop" and so on (item of
> arbitrary type or null) can return everything. An
> example for "boolean or object" is 'date_create' [1]. Afaik there is no
> built-in function, that returns a closure, so
> the combination "boolean or closure" is not possible at all.
>
> Hm... date_create is an alias of DateTime::__construct and as far as I
> understood __construct returns usually an object
> and false only in the case where an exception has been thrown anyway.
> Right?
>
It isn't directly an alias, because one is a method and the other one a
function ;) OK, thats too easy, but that makes the difference: In case of
an error DateTime::__construct() emits an Exception (OOP-like), whereas
date_create() proceeds, but return 'false' (functional-like).
--
github.com/KingCrunch