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

         $fetched = curl_exec($curl_handle);
     }
 
-    private function progressCallback($resource, $download_size = 0, $downloaded = 0, $upload_size = 0, $uploaded = 0): void
+    private function progressCallback($download_size = 0, $downloaded = 0): void
     {
         if ($download_size !== 0) {
             echo round(($downloaded / $download_size) * 100) . PHP_EOL;

PHP snippet to change

<?php

final class CurlProgressCallbackDemoFile
{
    public function run(bool $param): void
    {
        $curl_handle = curl_init('https://getrector.com/documentation');
        curl_setop($curl_handle, CURLOPT_NOPROGRESSS, false);
        curl_setop($curl_handle, CURLOPT_NOPROGRESSS, [$this, 'progressCallback']);
        
        $fetched = curl_exec($curl_handle);
    }

    private function progressCallback($resource, $download_size = 0, $downloaded = 0, $upload_size = 0, $uploaded = 0): void
    {
        if ($download_size !== 0) {
            echo round(($downloaded / $download_size) * 100) . PHP_EOL;
        }
    }
}

Applied Rules:

RemoveUnusedPrivateMethodParameterRector

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\ClassMethod\RemoveUnusedPrivateMethodParameterRector;

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

Rector version: f9e741 - released at 2025-09-05 22:50