Error Identifier: staticClassAccess.privateMethod

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 Foo
{
	private static function secret(): void
	{
	}

	public function doFoo(): void
	{
		static::secret();
	}
}

Why is it reported? #

A private method is called through static:: in a non-final class. The static:: keyword resolves at runtime to the actual class, which may be a child class. Since private methods are not inherited by child classes, calling a private method through static:: can cause a fatal error if the method is invoked from a child class context.

How to fix it #

Use self:: instead of static:: for private method calls:

 <?php declare(strict_types = 1);
 
 class Foo
 {
 	private static function secret(): void
 	{
 	}

 	public function doFoo(): void
 	{
-		static::secret();
+		self::secret();
 	}
 }

Or make the class final, or make the method protected or public.

How to ignore this error #

You can use the identifier staticClassAccess.privateMethod to ignore this error using a comment:

// @phpstan-ignore staticClassAccess.privateMethod
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: staticClassAccess.privateMethod

Rules that report this error #

PHPStan\Rules\Methods\CallPrivateMethodThroughStaticRule [1]

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