while.alwaysFalse

Code example

<?php declare(strict_types = 1);

function doFoo(): void
{
	while (false) {
		echo 'unreachable';
	}
}

Why is it reported?

The condition of the while loop always evaluates to false, which means the loop body will never execute. This is dead code and usually indicates a logic error, such as a condition that was incorrectly written or a variable whose type has been narrowed to a state that makes the condition impossible.

How to fix it

Fix the condition so that the loop can actually execute:

 <?php declare(strict_types = 1);

-function doFoo(): void
+function doFoo(bool $condition): void
 {
-	while (false) {
+	while ($condition) {
 		echo 'reachable';
+		$condition = false;
 	}
 }

Or remove the dead code if the loop is no longer needed:

 <?php declare(strict_types = 1);

 function doFoo(): void
 {
-	while (false) {
-		echo 'unreachable';
-	}
 }