WhereNullComparisonToWhereNullRector

Find another rule

Convert to where comparison to whereNull method call

-$query->where('foo', null);
-$query->where('foo', '=', null);
-$query->where('foo');
-$query->where('foo', '!=', null);
+$query->whereNull('foo');
+$query->whereNull('foo');
+$query->whereNull('foo');
+$query->whereNotNull('foo');

Configure your rector.php:

<?php

use RectorLaravel\Rector\MethodCall\WhereNullComparisonToWhereNullRector;
use Rector\Config\RectorConfig;

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