Cannot use "static" as method modifier in trait alias¶

Description¶

The as adaptation syntax used with use (traits) can only change the visibility of an imported method, or give it a new alias. It cannot be used to add the static modifier to a method: a trait method’s static-ness is fixed by how it is declared in the trait itself, and cannot be altered by the class that imports it.

Example¶

<?php

trait Greet
{
    public function hello()
    {
        echo 'hi';
    }
}

class X
{
    use Greet {
        hello as static greetStatically;
    }
}

?>

Literal Examples¶

Cannot use “static” as method modifier in trait alias

Solutions¶

Remove the static modifier from the as adaptation, and only change the visibility or the alias name.
Declare the method as static directly in the trait, if that is the intended behavior.

Changed Behavior¶

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.