ThrowIfAndThrowUnlessExceptionsToUseClassStringRector

Find another rule

changes use of a new throw instance to class string

-throw_if($condition, new MyException('custom message'));
+throw_if($condition, MyException::class, 'custom message');

Configure your rector.php:

<?php

use RectorLaravel\Rector\FuncCall\ThrowIfAndThrowUnlessExceptionsToUseClassStringRector;
use Rector\Config\RectorConfig;

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