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Error Identifier: staticMethod.nonObject

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);

/**
 * @param int|string $value
 */
function doFoo($value): void
{
    $value::foo();
}

Why is it reported? #

A static method is being called on a value that is not an object or class name. Static methods can only be called on class names (as strings or class references) or on objects. Calling a static method on a type like int, float, bool, or a union that does not guarantee an object type will result in a runtime error.

How to fix it #

Ensure the variable holds a valid class name or object before calling a static method on it:

 <?php declare(strict_types = 1);
 
-/**
- * @param int|string $value
- */
-function doFoo($value): void
+function doFoo(string $className): void
 {
-    $value::foo();
+    if (is_a($className, MyClass::class, true)) {
+        $className::foo();
+    }
 }

Or call the static method directly on the class:

 <?php declare(strict_types = 1);
 
-/**
- * @param int|string $value
- */
-function doFoo($value): void
+function doFoo(): void
 {
-    $value::foo();
+    MyClass::foo();
 }

How to ignore this error #

You can use the identifier staticMethod.nonObject to ignore this error using a comment:

// @phpstan-ignore staticMethod.nonObject
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: staticMethod.nonObject

Rules that report this error #

• PHPStan\Rules\Methods\CallStaticMethodsRule [1]
• PHPStan\Rules\Methods\StaticMethodCallableRule [1]

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