A Middleware for Laravel/Lumen, Which "Trims" Requests, Removes "White Spaces" and Converts "Persian/Arabic Numbers to English Ones"

RequestBeautifier.php

<?php

namespace App\Http\Middleware;

use Closure;

class RequestBeautifier
{
    protected $except = [
        'password',
        'password_confirmation',
    ];

    public function handle($request, Closure $next, $guard = null)
    {
        foreach ($request->all() as $key => $value)
        {
            !in_array( (string)$key,array_values($this->except) ) && $request->merge([$key => $this->beautify($value)]);
        }

        return $next($request);
    }

    public function beautify($input)
    {
        if(is_array($input))
        {
            foreach ($input as $key => $inp)
            {
                $input[$key] = !in_array((string)$key,$this->except) ? $this->beautify($inp) : $inp;
            }
            return $input;
        }

        $input = preg_replace('/\s+/', ' ', trim($input));

        $persian = ['۰', '۱', '۲', '۳', '۴', '٤', '۵', '٥', '٦', '۶', '۷', '۸', '۹'];
        $english = [ 0 ,  1 ,  2 ,  3 ,  4 ,  4 ,  5 ,  5 ,  6 ,  6 ,  7 ,  8 ,  9 ];

        return str_replace($persian, $english, $input);
    }

}