Rector works with all class names as fully qualified by default. That way it knows the exact types even on just changed nodes. In the most projects, that's not a desired behavior, because short version with use statement is easier to read:
<?php
+use App\Some\Namespace\SomeClass;
-$object = new \App\Some\Namespace\SomeClass();
+$object = new SomeClass();
To import FQN like these, configure rector.php with:
<?php
use Rector\Config\RectorConfig;
return RectorConfig::configure()
->withImportNames();
Single short classes are imported too:
<?php
+use DateTime;
-$someClass = \DateTime();
+$someClass = DateTime();
To keep those:
<?php
use Rector\Config\RectorConfig;
return RectorConfig::configure()
->withImportNames(importShortClasses: false);
<?php
use Rector\Config\RectorConfig;
return RectorConfig::configure()
->withImportNames(removeUnusedImports: true);
That's it. Happy coding!