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Error Identifier: staticProperty.dynamicName

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.

This error is reported by phpstan/phpstan-strict-rules.

Code example #

<?php declare(strict_types = 1);

class Registry
{
	public static string $name = 'default';

	public static function get(string $property): string
	{
		return Registry::$$property;
	}
}

Why is it reported? #

Accessing a static property with a dynamic (variable) name makes the code harder to follow and analyse statically. PHPStan cannot verify that the variable holds a valid property name, which may lead to runtime errors that go undetected during analysis.

How to fix it #

Replace the variable static property access with explicit property references.

 <?php declare(strict_types = 1);
 
 class Registry
 {
 	public static string $name = 'default';

-	public static function get(string $property): string
+	public static function get(string $property): ?string
 	{
-		return Registry::$$property;
+		return match ($property) {
+			'name' => Registry::$name,
+			default => null,
+		};
 	}
 }

How to ignore this error #

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

// @phpstan-ignore staticProperty.dynamicName
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.dynamicName

Rules that report this error #

• PHPStan\Rules\VariableVariables\VariableStaticPropertyFetchRule [1] phpstan/phpstan-strict-rules

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