← Back to method.*

Error Identifier: method.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);

function doFoo(int|string $value): void
{
	$value->toString(); // ERROR: Cannot call method toString() on int|string.
}

Why is it reported? #

A method is being called on a value whose type does not support method calls. Methods can only be called on objects. In the example above, $value is int|string, neither of which is an object type, so calling a method on it is invalid.

How to fix it #

Narrow the type to an object before calling the method:

 <?php declare(strict_types = 1);
 
-function doFoo(int|string $value): void
+function doFoo(int|string|Stringable $value): void
 {
-	$value->toString();
+	if ($value instanceof Stringable) {
+		$value->toString();
+	}
 }

Or change the parameter type to accept only objects that have the desired method:

 <?php declare(strict_types = 1);
 
-function doFoo(int|string $value): void
+function doFoo(Stringable $value): void
 {
 	$value->toString();
 }

How to ignore this error #

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

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

Rules that report this error #

• PHPStan\Rules\Methods\CallMethodsRule [1]
• PHPStan\Rules\Methods\MethodCallableRule [1]

Edit this page on GitHub