PHP Trait call inherited function

Question

I have got a trait

trait Foo{

    protected static function foo(){
        echo 'Hello';
    }
}

and a class

class Bar{
    use Foo;

    private static function foo(){
        Foo::foo();

        echo ' World!';
    }
}

I cannot use Foo:foo(). What can I do to achieve the desired effect?

EDIT

Using

use Foo {foo as parentFoo}

private static function foo(){

    self::parentFoo();

    echo ' World!';

}

did the trick.

see conflict resolution php.net/manual/en/language.oop5.traits.php — goat
– goat, Commented Dec 11, 2012 at 22:35
Psst, you're trying to call a non-static method in a static way. You should be seeing a warning about that. Maybe you should turn your error_reporting level up. — Charles
– Charles, Commented Dec 11, 2012 at 22:38
Oh, oops, I forgot to add the static keywords in the description. They are both static in reality. – @rambocoder: Thanks, see edit. It did the trick. — arik
– arik, Commented Dec 11, 2012 at 22:39

arik · Accepted Answer · 2012-12-11 22:59:31Z

11

You can do something like this:

class Bar{

    use Foo {
        Foo::foo as foofoo;
    }

    private static function foo(){

        self::foofoo();

        echo ' World!';

    }

}

edited Dec 11, 2012 at 22:59

arik

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answered Dec 11, 2012 at 22:49

Mike Brant

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2 Comments

arik Over a year ago

Yep, exactly, except for the semicolon position and the static keyword ;) Thanks.

Mike Brant Over a year ago

Yes, didn't see the change in the question to static.

Th. Ma. · Accepted Answer · 2012-12-11 22:57:15Z

Are you allowed to rename your trait method foo to fooo?

If yes, please do and replace Foo::foo() with Foo:fooo() in your class method body before following static call syntax (by adding static keyword to your trait function definition)

<?php

trait Foo 
{
    protected static function Fooo()
    {
        echo 'Hello';
    }
}

class Bar 
{
    use Foo;

    private static function foo() 
    {
        self::fooo();

        echo ' World!';
    }

    public static function expose() 
    {
        echo self::foo();
    }
}

echo Bar::expose();

EDIT:

Obviously, the answer to my question was "No, you're not allowed to rename the trait method", for which case, you've pointed out a solution related to native conflict resolution embedded in PHP: http://php.net/manual/en/language.oop5.traits.php#language.oop5.traits.conflict

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