[LARAVEL HELPERS] My collection of laravel helpers

helpers.php

<?php

/**
 * Get old input value, and explode it by comma
 * @param $key
 * @return false|string
 */
function oldList($key)
{
    return json_encode(
        array_filter(
            explode(
                ",",
                old($key)
            )
        )
    );
}

/**
 * Check is request param exits and have value
 * @param string $name
 * @param null $value
 * @return bool
 */
function hasParam(string $name, $value = null)
{
    if (!request()->has($name)){
        return false;
    }

    if ($value !== null){
        return request()->get($name) === $value;
    }

    return true;
}

/**
 * @param string $text
 * @return string
 */
function parsedown(string $text)
{
    $parser = app('parsedown');
    return $parser->text($text);
}