Using private method as callable: SlevomatCodingStandard.Classes.UnusedPrivateElements.UnusedMethod

[zlodes]

Hi!

Sniff SlevomatCodingStandard.Classes.UnusedPrivateElements.UnusedMethod detects unused private method, but it is using as callable with array synax (e.g. [$this, 'methodName']).

Error:

FILE: /home/vagrant/projects/secret-project/src/PrivateMethodDemo.php
--------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
--------------------------------------------------------------------------------
 23 | ERROR | Class PrivateMethodDemo contains unused private method
    |       | privateMethod().
    |       | (SlevomatCodingStandard.Classes.UnusedPrivateElements.UnusedMethod)

Packages versions

squizlabs/php_codesniffer version: 3.5.6
slevomat/coding-standard version 6.4.0

Code example:

<?php

declare(strict_types=1);

namespace AI\B2TraderApi;

use Closure;

class PrivateMethodDemo
{
    public function getClosureFromPrivateMethod(): void
    {
        $closure = Closure::fromCallable([$this, 'privateMethod']);

        $closure();
    }

    public function callPrivateMethodUsingCallUserFuncArray(): void
    {
        call_user_func_array([$this, 'privateMethod'], []);
    }

    private function privateMethod(): void
    {
        // Do nothing
    }
}

P.S.: PhpStorm can detect that the private method is used.

[kukulich]

This sniff is marked as deprecated

[zlodes]

@kukulich what the alternative of it?

[kukulich]

coding-standard/SlevomatCodingStandard/Sniffs/Classes/UnusedPrivateElementsSniff.php

Line 61 in 7406841

* @deprecated https://phpstan.org/blog/detecting-unused-private-properties-methods-constants

[zlodes]

@kukulich thanks!

[github-actions]

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