property.staticAsymmetricVisibility

Code example

<?php declare(strict_types = 1);

class Counter
{

	public protected(set) static int $count = 0;

}

Why is it reported?

Asymmetric visibility (such as protected(set) or private(set)) is being used on a static property, but this combination is only supported on PHP 8.5 and later. On earlier PHP versions, static properties cannot have different read and write visibility levels.

How to fix it

Remove the asymmetric visibility from the static property:

 <?php declare(strict_types = 1);

 class Counter
 {

-	public protected(set) static int $count = 0;
+	protected static int $count = 0;

 }

Alternatively, upgrade to PHP 8.5 or later where asymmetric visibility for static properties is supported.