ThrowIfRector

Change if throw to throw_if

-if ($condition) {
-    throw new Exception();
-}
-if (!$condition) {
-    throw new Exception();
-}
+throw_if($condition, new Exception());
+throw_unless($condition, new Exception());

Configure your rector.php:

<?php

use RectorLaravel\Rector\If_\ThrowIfRector;
use Rector\Config\RectorConfig;

return RectorConfig::configure()
    ->withRules([
        ThrowIfRector::class,
    ]);