booleanAnd.alwaysFalse

Code example

<?php declare(strict_types = 1);

function doFoo(int $i): void
{
	$result = $i > 5 && $i < 3;
}

Why is it reported?

The result of the && (boolean AND) expression always evaluates to false. This happens when it is impossible for both sides of the operator to be truthy at the same time. In the example above, $i cannot be both greater than 5 and less than 3 simultaneously, so the entire expression is always false. This usually indicates a logic error or dead code.

How to fix it

Fix the logic so that both conditions can be satisfied:

 <?php declare(strict_types = 1);

 function doFoo(int $i): void
 {
-	$result = $i > 5 && $i < 3;
+	$result = $i > 3 && $i < 5;
 }

Or remove the expression entirely if the code block is unreachable:

 <?php declare(strict_types = 1);

 function doFoo(int $i): void
 {
-	$result = $i > 5 && $i < 3;
 }