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Error Identifier: property.uninitialized

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 string $name;

	public function getName(): string
	{
		return $this->name;
	}
}

Why is it reported? #

The class has a typed property that is never assigned a value – neither as a default value nor in the constructor. Accessing an uninitialized typed property in PHP causes a fatal error (Typed property must not be accessed before initialization).

This rule does not apply to readonly properties, which have their own dedicated checks.

How to fix it #

Assign a default value to the property:

 class Foo
 {
-	private string $name;
+	private string $name = '';
 }

Or initialize the property in the constructor:

 class Foo
 {
 	private string $name;

+	public function __construct(string $name)
+	{
+		$this->name = $name;
+	}
+
 	public function getName(): string
 	{
 		return $this->name;
 	}
 }

How to ignore this error #

You can use the identifier property.uninitialized to ignore this error using a comment:

// @phpstan-ignore property.uninitialized
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: property.uninitialized

Rules that report this error #

• PHPStan\Rules\Properties\UninitializedPropertyRule [1] [2]

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