Cannot Call Traits Methods Directly

Traits used to be called directly, like a class. In PHP 8.1, this feature has been removed. The methods, properties or constants of the trait must be called in the context of their host class.

PHP code

<?php

trait t {
    static function foo() { echo __METHOD__; }

}

echo t::foo();

Before

t::foo

After

PHP Deprecated:  Calling static trait method t::foo is deprecated, it should only be called on a class using the trait in /codes/callTraitAlone.php on line 8

Deprecated: Calling static trait method t::foo is deprecated, it should only be called on a class using the trait in /codes/callTraitAlone.php on line 8
t::foo

PHP version change

This behavior was deprecated in 8.1

This behavior changed in 9.0

Error Messages

• Calling static trait method t::foo is deprecated, it should only be called on a class using the trait