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Error Identifier: phpstan.dumpType

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 $a, string $b): void
{
	\PHPStan\dumpType($a); // Dumped type: int
	\PHPStan\dumpType($b); // Dumped type: string
}

Why is it reported? #

The PHPStan\dumpType() function is a debugging tool built into PHPStan. When called, PHPStan reports the type of each argument as an error. This is useful for inspecting what type PHPStan has inferred for a given expression at a specific point in the code.

Each argument passed to dumpType() produces a separate error message showing the type PHPStan has determined for that expression, including any type narrowing from conditions, type guards, or other control flow.

This error is not ignorable because it is a debugging utility intended to be removed after the investigation is complete.

How to fix it #

Remove the \PHPStan\dumpType() call once the type has been inspected:

 <?php declare(strict_types = 1);
 
 function doFoo(int $a, string $b): void
 {
-	\PHPStan\dumpType($a);
-	\PHPStan\dumpType($b);
+	// actual code here
 }

Non-ignorable error #

This error cannot be ignored using @phpstan-ignore or the ignoreErrors configuration. Non-ignorable errors indicate code that would cause a crash or a fatal error at runtime, or a fundamental problem in the analysed code that must be addressed.

Rules that report this error #

• PHPStan\Rules\Debug\DumpTypeRule [1]

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