<?php
function sanitize($input)
{
    if (is_array($input)) :
        foreach ($input as $key => $value) :
            $result[$key] = sanitize($value);
        endforeach;
    else :
        $result = htmlentities($input, ENT_QUOTES, 'UTF-8');
    endif;

    return $result;
}

function rand_string()
{

    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $substr = substr(str_shuffle($chars), 0, 6);
    return $substr;
}

function getCurrentURL()
{
    $base_url = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http') . '://' .  $_SERVER['HTTP_HOST'];
    $url = $base_url . $_SERVER["REQUEST_URI"];
    return $url;
}

function replaceQueryParam($url, $key, $value)
{
    $parsedUrl = parse_url($url);

    parse_str($parsedUrl['query'] ?? '', $query);
    $query[$key] = $value;

    $newQueryString = http_build_query($query);

    return sprintf(
        "%s://%s%s?%s%s",
        $parsedUrl['scheme'],
        $parsedUrl['host'],
        $parsedUrl['path'] ?? '',
        $newQueryString,
        isset($parsedUrl['fragment']) ? '#' . $parsedUrl['fragment'] : ''
    );
}