CreateFunctionToAnonymousFunctionRector

Find another rule

Use anonymous functions instead of deprecated create_function()

 class ClassWithCreateFunction
 {
     public function run()
     {
-        $callable = create_function('$matches', "return '$delimiter' . strtolower(\$matches[1]);");
+        $callable = function($matches) use ($delimiter) {
+            return $delimiter . strtolower($matches[1]);
+        };
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Php72\Rector\FuncCall\CreateFunctionToAnonymousFunctionRector;

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

SETS: PHP 7.2