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

Rector run Failed:

{ "totals": { "changed_files": 0, "errors": 1 }, "errors": [ { "message": "System error: \"PhpParser\\Node\\Expr\\BinaryOp::__construct(): Argument #2 ($right) must be of type PhpParser\\Node\\Expr, null given, called in /var/www/vendor/rector/rector/rules/DeadCode/Rector/If_/RemoveDeadIfBlockRector.php on line 121\"\nRun Rector with \"--debug\" option and post the report here: https://github.com/rectorphp/rector/issues/new", "file": "/var/www/storage/demo/34goye9ja9armjyknpll/rector_analyzed_file.php", "line": 20 } ] }

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

PHP snippet to change

<?php

final class Demo
{
    public function run(): void
    {
        $value = 1;
        $flag = true;

        if ($flag) {
        } elseif ($value === 2) {
        } elseif ($value === 3 || $value === 4) {
            echo "matched";
        }
    }
}

Config rector.php

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\DeadCode\Rector\If_\RemoveDeadIfBlockRector;

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

Rector version: ffbf10 - released at 2026-04-05 15:21