Error Identifier: staticProperty.protected

Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.

Code example #

<?php declare(strict_types = 1);

class Base
{
	protected static int $counter = 0;
}

class Unrelated
{
	public function read(): int
	{
		return Base::$counter;
	}
}

Why is it reported? #

The code accesses a protected static property from a class that is not a subclass of the declaring class. Protected properties can only be accessed from within the declaring class or its descendants.

How to fix it #

Access the property from within the class hierarchy, or provide a public accessor method.

 <?php declare(strict_types = 1);
 
 class Base
 {
 	protected static int $counter = 0;
+
+	public static function getCounter(): int
+	{
+		return static::$counter;
+	}
 }

 class Unrelated
 {
 	public function read(): int
 	{
-		return Base::$counter;
+		return Base::getCounter();
 	}
 }

How to ignore this error #

You can use the identifier staticProperty.protected to ignore this error using a comment:

// @phpstan-ignore staticProperty.protected
codeThatProducesTheError();

You can also use only the identifier key to ignore all errors of the same type in your configuration file in the ignoreErrors parameter:

parameters:
	ignoreErrors:
		-
			identifier: staticProperty.protected

Rules that report this error #

PHPStan\Rules\Properties\AccessStaticPropertiesInAssignRule [1]
PHPStan\Rules\Properties\AccessStaticPropertiesRule [1]

Edit this page on GitHub

Theme