toolvana/app/Models/SettingModel.php

<?php

declare(strict_types=1);

namespace App\Models;

use CodeIgniter\Model;

final class SettingModel extends Model
{
    protected $table         = 'settings';
    protected $primaryKey    = 'key';
    protected $returnType    = 'array';
    protected $useTimestamps = false;
    protected $allowedFields = ['key', 'value', 'updated_at'];

    public function get(string $key, ?string $default = null): ?string
    {
        $row = $this->find($key);

        return $row === null ? $default : (string) $row['value'];
    }

    public function put(string $key, string $value): void
    {
        $this->db->table($this->table)->upsert(['key' => $key, 'value' => $value]);
    }

    /** @return array<string,string> */
    public function all(): array
    {
        return array_column($this->findAll() ?: [], 'value', 'key');
    }
}