Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 
 function foo(): void {
   $map = new Map();
-  $value = $map->get('foo', null);
+  $value = $map->get('foo');
   if ($value) {
     //...
   }
 }

PHP snippet to change

<?php

use Ds\Map;

function foo(): void {
  $map = new Map();
  $value = $map->get('foo', null);
  if ($value) {
    //...
  }
}

Applied Rules:

RemoveNullArgOnNullDefaultParamRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\DeadCode\Rector\MethodCall\RemoveNullArgOnNullDefaultParamRector;
use Rector\ValueObject\PhpVersion;

return RectorConfig::configure()
    // B. or few rules
    ->withRules([
        RemoveNullArgOnNullDefaultParamRector::class
    ])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: b12180 - released at 2026-01-03 18:52