CoalesceToTernaryRector

Find another rule

Replace coalesce to ternary when left side is non nullable

 function run(string $a)
 {
-	return $a ?? 'foo';
+	return $a ?: 'foo';
 }

Configure your rector.php:

<?php

use Rector\CodeQuality\Rector\Coalesce\CoalesceToTernaryRector;
use Rector\Config\RectorConfig;

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