cms11/app/Services/HtmlValidator.php

<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;

class HtmlValidator
{
    public static function validateSource(string $html)
    {
        $response = Http::withHeaders([
            'Content-Type' => 'text/html; charset=utf-8',
        ])->withBody($html, 'text/html')->post(env('HTML5_VALIDATOR_URL') . '/?out=json');

        $json = $response->json();

        return $json;
    }
}