PXG_2026_API/app/Services/GroupCodeService.php

<?php

namespace App\Services;

class GroupCodeService
{
    public function make(): string
    {
        $alphabet = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
        $s = '';
        for ($i=0;$i<6;$i++){
            $s .= $alphabet[random_int(0, strlen($alphabet)-1)];
        }
        return $s;
    }
}