booleanNot.alwaysFalse

Code example

<?php declare(strict_types = 1);

function doFoo(): void
{
	$one = 1;
	if (!$one) {
		// never entered
	}
}

Why is it reported?

The negated boolean expression (!$one) always evaluates to false because the operand is always truthy. In this example, the variable $one is always 1, which is truthy in PHP, so !$one is always false. This means the condition will never be entered, which usually indicates a logic error or dead code.

How to fix it

Remove the unreachable condition:

 <?php declare(strict_types = 1);

 function doFoo(): void
 {
 	$one = 1;
-	if (!$one) {
-		// never entered
-	}
 }

Or fix the logic to check the correct variable or expression.