adds git_hash helper for laravel

helper.php

function http_build_url(array $parsed) {
    $get = function ($key) use ($parsed) {
        return isset($parsed[$key]) ? $parsed[$key] : null;
    };

    $pass      = $get('pass');
    $user      = $get('user');
    $userinfo  = $pass !== null ? "$user:$pass" : $user;
    $port      = $get('port');
    $scheme    = $get('scheme');
    $query     = $get('query');
    $fragment  = $get('fragment');
    $authority =
        ($userinfo !== null ? "$userinfo@" : '') .
        $get('host') .
        ($port ? ":$port" : '');

    return
        (strlen($scheme) ? "$scheme:" : '') .
        (strlen($authority) ? "//$authority" : '') .
        $get('path') .
        (strlen($query) ? "?$query" : '') .
        (strlen($fragment) ? "#$fragment" : '');
}

function url_with_query($path = null, $parameters = [], $secure = null, $query = [])
{
    $url = app('Illuminate\Contracts\Routing\UrlGenerator')->to($path, $parameters, $secure);
    $parsed = parse_url($url);
	$parsed['query'] = http_build_query(array_key_exists('query', $parsed) ? array_merge_recursive(parse_str($parsed['query']), $query) : $query);
    return http_build_url($parsed);
}

function git_hash($url=null, $parameters = [], $secure = null, $query = []){
	$git_hash = Cache::rememberForever('git_hash', function() { return file_get_contents(base_path('.git/refs/heads/master')); });
	if(!$url){
		return $git_hash;
	} else {
		return url_with_query($url, $parameters, $secure, array_merge_recursive($query, ['hash' => $git_hash]));
	}
}