PHP(PHP2414) with trait

Meday

Hello,
Devsens show me an error on the Test class with a specific case of trait use :

Class Test does not implement abstract methods:
protected function test(): stringPHP(PHP2414)

Code :

<?php

// from vendor
trait uncleTrait {
    abstract protected static function test(): string;
}

// from vendor
trait parentTrait {
    protected static function test(): string {
        return 'parent';
    }
}

trait childTrait {
    use uncleTrait;
    use parentTrait;

    // other methods
}

class Test {
    use childTrait;

    public static function hello(): string {
        return self::test();
    }
}

As far as I remember, I got this error not a long time ago.
Is it something "fixable" ?
The code is working fine btw.

Thank you !

JakubMisek

Meday Thank you very much for the test case.

We'll fix the false warning!

A side note: this is an undocumented PHP behavior. Traits are not the same thing as inheritance. They are used as a blueprint that's "copied" into the class (so the abstract uncle function does not make any use here, it's practically ignored by PHP, not overridden). In this case, PHP may trigger an error in the future version. The bulletproof syntax would be the following:

use uncleTrait, parentTrait {
  parentTrait::test insteadof uncleTrait;
}

Meday

Thanks for your answer, the side note and your work :)

JakubMisek

Meday it may help someone else in the future :)

The fix is ready, we'll release the update within a week