Re: __constructor parameter limitations.

On Sat, Sep 17, 2011 at 17:08, Laruence <laruence@php.net> wrote: > 2011/9/17 <devis@lucato.it>: > > Hi, > > > > I think Richards intended other methods often used in combination with > > __construct: > > > > class A { public function init($a, $b) { } } > > class B extends A { public function init($a) { } } > > > > => PHP Strict Standards: Declaration of B::init() should be compatible > with > > that of A::init() > do you know any reason for this? > The reason for this is simply that B must act like A since every B object is also an object of A. > > > > The example with __construct() is valid (at least in 5.3). > > > > > > Devis > > > > > > On 17 September 2011 14:43, Nikita Popov <nikita.ppv@googlemail.com> > wrote: > > > >> Hi Richard! > >> > >> Which change are you talking about? I just tried doing: > >> <?php > >> class A { public function __construct($a) { } } > >> class B extends A { public function __construct($a, $b) { } } > >> And it worked on 5.4 Beta 1 without errors. > >> > >> Nikita > >> > >> On Sat, Sep 17, 2011 at 3:27 PM, Richard Quadling <rquadling@gmail.com> > >> wrote: > >> > Hi. > >> > > >> > With the recent BC with regard the locking of the constructor's > >> > signature for subclasses, what is the expected mechanism for allowing > >> > a subclass to have additional parameters? > >> > > >> > You can always supply them and use func_get_args() / func_num_args() / > >> > etc. to read them. > >> > > >> > It would seem that the limitation restricts the capabilities. I'm not > >> > a purist. Software development is a compromise between purity and > >> > getting the job done in an efficient and understandable manner. > >> > > >> > By allowing undocumented parameters to the constructor (due to the > >> > enforced signature), this would seem to break things on a different > >> > front (I can't docblock non defined parameters for examples). > >> > >> -- > >> PHP Internals - PHP Runtime Development Mailing List > >> To unsubscribe, visit: http://www.php.net/unsub.php > >> > >> > > > > > > -- > Laruence Xinchen Hui > http://www.laruence.com/ > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Etienne Kneuss http://www.colder.ch