Error Identifier: doWhile.condNotBoolean

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);

$count = 5;

do {
    $count--;
} while ($count);

Why is it reported? #

The phpstan-strict-rules package enforces that conditions in do-while loops must be strictly boolean. Using a non-boolean value such as an integer or string relies on PHP’s implicit truthiness rules, which can lead to subtle bugs.

How to fix it #

Use an explicit boolean comparison in the condition:

 <?php declare(strict_types = 1);
 
 $count = 5;

 do {
     $count--;
-} while ($count);
+} while ($count > 0);

How to ignore this error #

You can use the identifier doWhile.condNotBoolean to ignore this error using a comment:

// @phpstan-ignore doWhile.condNotBoolean
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: doWhile.condNotBoolean

Rules that report this error #

PHPStan\Rules\BooleansInConditions\BooleanInDoWhileConditionRule [1] phpstan/phpstan-strict-rules

Edit this page on GitHub

Theme