[11.x] Simplify .php extension chopping in getNameInput (#51843)

* Simplify `.php` extension chopping in `getNameInput`

* Update GeneratorCommand.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Console/GeneratorCommand.php

@@ -417,13 +417,7 @@ protected function sortImports($stub)
      */
     protected function getNameInput()
     {
-        $name = trim($this->argument('name'));
-
-        if (Str::endsWith($name, '.php')) {
-            return Str::substr($name, 0, -4);
-        }
-
-        return $name;
+        return (string) Str::of($this->argument('name'))->trim()->beforeLast('.php');
     }
 
     /**