StrStartsWithRector

Change helper functions to str_starts_with()

 class SomeClass
 {
     public function run()
     {
-        $isMatch = substr($haystack, 0, strlen($needle)) === $needle;
+        $isMatch = str_starts_with($haystack, $needle);

-        $isNotMatch = substr($haystack, 0, strlen($needle)) !== $needle;
+        $isNotMatch = ! str_starts_with($haystack, $needle);
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Php80\Rector\Identical\StrStartsWithRector;

return RectorConfig::configure()
    ->withRules([
        StrStartsWithRector::class,
    ]);
SETS:  PHP 8.0 Polyfills