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:

 {
     public function run(bool $param)
     {
-        return ord('0');
+        return ord('0'[0]);
     }
 }

PHP snippet to change

<?php

final class DemoFile
{
    public function run(bool $param)
    {
        return ord('0');
    }
}

Applied Rules:

OrdSingleByteRector

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\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;
use Rector\Php85\Rector\FuncCall\OrdSingleByteRector;

return RectorConfig::configure()
    ->withRules([
        OrdSingleByteRector::class
    ])
    ->withPhpVersion(PhpVersion::PHP_85);

Rector version: 007114 - released at 2026-03-12 18:24