PHP - how can I overload a function without using null values

Question

I want to have this interface:

interface Resource_Controller_Interface {
    public function index_get():stdClass;
    public function index_get(mixed $key):array;
    public function index_post():bool;
    public function index_put(mixed $key):bool;
    public function index_patch(mixed $key):bool;
    public function index_delete(mixed $key):bool;
}

Unfortunately, I cannot do two methods called 'index_get', even with different signatures.

I really want this interface to have these names though, is there a way I can do it? (using $key = null will not force implementation...)

possible duplicate of stackoverflow.com/questions/4697705/php-function-overloading — Jay Blanchard
– Jay Blanchard, Commented Jun 23, 2016 at 20:29
in general, cases like this are best handled by using both an interface and an abstract class, then you can have slightly modified version of the name in the interface ( to force implementation ) and then in the abstract class have a third function that sort of brings those together, if that makes sense. Just a thought. — ArtisticPhoenix
– ArtisticPhoenix, Commented Jun 23, 2016 at 21:13

Muhammad Sumon Molla Selim · Accepted Answer · 2016-06-23 20:32:04Z

1

You can make use of the func_num_args() and func_get_arg() to get the arguments passed, and use them normally.

This way the function name will be same but you will be able to do different things using some conditionals.

answered Jun 23, 2016 at 20:32

Muhammad Sumon Molla Selim

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3 Comments

Amit Over a year ago

I can just do null in this case, but why isn't the different signature allowed?

Muhammad Sumon Molla Selim Over a year ago

Function signatures are based only on their names and do not include argument lists, so you cannot have two functions with the same name.

ArtisticPhoenix Over a year ago

dont forget function_get_args ( with an s )

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