yf_utils class

    public function array_replace_recursive($array_1, $array_2)
    {
        if ( ! is_array($array_1) or ! is_array($array_2)) {
            return $array_2;
        }
        foreach ((array) $array_2 as $key_2 => $value_2) {
            $array_1[$key_2] = $this->array_replace_recursive(($array_1[$key_2] ?? null), $value_2);
        }
        return $array_1;
    }

    public function back($where_go_back = 'javascript:history.back()', $what_to_say = 'back')
    {
        if ($what_to_say == 'back' || $what_to_say == '') {
            $what_to_say = t('back');
        }
        return $Text = "<div align=\"center\"><input type='button' class='btn btn-default' onclick=\"javascript:window.location.href='" . $where_go_back . "'\" value='" . $what_to_say . "'></div>";
    }

    public function checkdnsrr($hostName, $recType = '')
    {
        if ( ! empty($hostName)) {
            if ($recType == '') {
                $recType = 'MX';
            }
            @exec("nslookup -type=$recType $hostName", $result);
            // check each line to find the one that starts with the host
            // name. If it exists then the function succeeded.
            foreach ((array) $result as $line) {
                if (preg_match('/^' . $hostName . '/i', $line)) {
                    return true;
                }
            }
            // otherwise there was no mail handler for the domain
            return false;
        }
        return false;
    }

    public function d()
    {
        foreach (func_get_args() as $key => $value) {
            printf("<pre><b>variable[ %s ]</b>:\n%s</pre>", $key, var_export($value, true));
        }
    }

    public function encode_email($addr = '', $as_html_link = false)
    {
        if ($as_html_link) {
            $addr = 'mailto:' . $addr;
        }
        $length = strlen($addr);
        // leave ':' alone (to spot mailto: later)
        $addr = preg_replace_callback('/([^\:])/', function ($matches) {
            $char = $matches[1];
            $r = rand(0, 100);
            // roughly 10% raw, 45% hex, 45% dec
            // '@' *must* be encoded. I insist.
            if ($r > 90 && $char != '@') {
                return $char;
            }
            if ($r < 45) {
                return '&#x' . dechex(ord($char)) . ';';
            }
            return '&#' . ord($char) . ';';
        }, $addr);
        // Convert into HTML anchor link
        if ($as_html_link) {
            $addr = '<a href="' . $addr . '">' . $addr . '</a>';
        }
        // strip the mailto: from the visible part
        $addr = preg_replace('/">.+?:/', '">', $addr);
        return $addr;
    }

    public function error_back($where_go_back = 'javascript:history.back()', $what_to_say = 'error')
    {
        if ( ! $what_to_say == 'error' || $what_to_say == '') {
            $what_to_say = t('error');
        }
        if ( ! $where_go_back) {
            $where_go_back = 'javascript:history.back()';
        }
        return $Text = '<div align="center"><strong>' . $what_to_say . "</strong><input type='button' class='btn btn-default' onclick=\"javascript:window.location.href='" . $where_go_back . "'\" value='" . ucfirst(t('back')) . "'></div>";
    }

    public function format_bbcode_text($body = '')
    {
        if (empty($body)) {
            return '';
        }
        return _class('bb_codes')->_process_text($body);
    }

    public function generate_password($Length)
    {
        return substr(base64_encode(md5(microtime(true))), 0, $Length);
    }

    public function highlight($string, $search_words, $tag = 'span', $class = 's_word')
    {
        if (empty($string) || empty($search_words)) {
            return $string;
        }
        $class = ! empty($class) ? ' class="' . $class . '"' : '';
        $search_words = preg_replace('/[^\d_!?\p{L}-]/imsu', ' ', $search_words);
        $search_words = explode(' ', $search_words);
        $prepared = [];
        foreach ((array) $search_words as $item) {
            if ( ! empty($item)) {
                $prepared[strtolower($item)] = strlen($item);
            }
        }
        if (empty($prepared)) {
            return $string;
        }
        arsort($prepared);
        foreach ((array) $prepared as $item => $length) {
            $replace[] = '<~>$1<~~>';
            $search[] = '/(' . preg_quote($item, '/') . ')/iu';
        }
        $string = preg_replace($search, $replace, $string);
        $string = str_replace('<~>', '<' . $tag . $class . '>', $string);
        $string = str_replace('<~~>', '</' . $tag . '>', $string);
        return $string;
    }

    public function hyperlink(&$text)
    {
        // match protocol://address/path/file.extension?some=variable&another=asf%
        $text = preg_replace('/\s(([a-zA-Z]+:\/\/)([a-z][a-z0-9_\..-]*[a-z]{2,6})([a-zA-Z0-9\/*-?&%]*))\s/i', ' <a href="$1">$3</a> ', $text);
        // match www.something.domain/path/file.extension?some=variable&another=asf%
        $text = preg_replace('/\s(www\.([a-z][a-z0-9_\..-]*[a-z]{2,6})([a-zA-Z0-9\/*-?&%]*))\s/i', ' <a href="http://$1">$2</a> ', $text);
        return $text;
    }

    public function js_alert($text)
    {
        echo "<script type='text/javascript'>alert('" . str_replace(["'", "\r", "\n"], '', $text) . "')</script>";
    }

    public function my_array_merge($a1, $a2)
    {
        foreach ((array) $a2 as $k => $v) {
            if (isset($a1[$k]) && is_array($a1[$k])) {
                if (is_array($a2[$k])) {
                    foreach ((array) $a2[$k] as $k2 => $v2) {
                        // the key is '' on purpose: this read used an undefined $k1 (null offset) before, kept as is for BC
                        if (isset($a1[$k]['']) && is_array($a1[$k][''])) {
                            $a1[$k][$k2] += $v2;
                        } else {
                            $a1[$k][$k2] = $v2;
                        }
                    }
                } else {
                    $a1[$k] += $v;
                }
            } else {
                $a1[$k] = $v;
            }
        }
        return $a1;
    }

    public function my_explode($string = '', $divider = "\n")
    {
        $result = explode("\n", trim($string));
        foreach ((array) $result as $k => $v) {
            $v = trim($v);
            if ( ! strlen($v)) {
                unset($result[$k]);
            }
        }
        return $result;
    }

    public function printr($var, $do_not_echo = false)
    {
        ob_start();
        print_r($var);
        $code = htmlentities(ob_get_clean());
        if ( ! $do_not_echo) {
            echo '<pre>' . $code . '</pre>';
        }
        return $code;
    }

    public function process_url($url = '', $force_rewrite = false, $for_site_id = false)
    {
        return _class('rewrite')->_rewrite_replace_links($url, true, $force_rewrite, $for_site_id);
    }

    public function recursive_unset(&$array, $unwanted_key)
    {
        unset($array[$unwanted_key]);
        foreach ($array as &$value) {
            if (is_array($value)) {
                $this->recursive_unset($value, $unwanted_key);
            }
        }
    }

    public function show_text($text = '')
    {
        $text_l = str_replace(' ', '_', strtolower($text));
        list($value) = db()->query_fetch('SELECT value AS `0` FROM ' . db('texts') . " WHERE name='" . db()->es($text_l) . "' AND active='1' AND language='" . db()->es(conf('language')) . "'");
        $text = strlen($value) ? stripslashes($value) : $text_l;
        return str_replace('_', ' ', $text);
    }

    public function smart_htmlspecialchars($html_text = '')
    {
        if ( ! strlen($html_text)) {
            return '';
        }
        $translation_table = [
            '"' => '"',
            '&' => '&',
            '\'' => ''',
            '<' => '<',
            '>' => '>',
        ];
        // Change the ampersand to translate to itself, to avoid getting &
        $translation_table[chr(38)] = '&';
        // Perform replacements
        // Regular expression says: find an ampersand, check the text after it,
        // if the text after it is not one of the following, then replace the ampersand
        // with &
        // a) any combination of up to 4 letters (upper or lower case) with at least 2 or 3 non whitespace characters, then a semicolon
        // b) a hash symbol, then between 2 and 7 digits
        // c) a hash symbol, an 'x' character, then between 2 and 7 digits
        // d) a hash symbol, an 'X' character, then between 2 and 7 digits
        return preg_replace('/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,7}|#x[0-9]{2,7}|#X[0-9]{2,7};)/', '&', strtr($html_text, $translation_table));
    }

    public function strftime_to_date_format($format)
    {
        $format = (string) $format;
        if (false === strpos($format, '%')) {
            return $format;
        }
        static $map = [
            '%a' => 'D', '%A' => 'l', '%d' => 'd', '%e' => 'j', '%j' => 'z', '%u' => 'N', '%w' => 'w',
            '%U' => 'W', '%V' => 'W', '%W' => 'W',
            '%b' => 'M', '%B' => 'F', '%h' => 'M', '%m' => 'm',
            '%C' => 'y', '%g' => 'y', '%G' => 'o', '%y' => 'y', '%Y' => 'Y',
            '%H' => 'H', '%k' => 'G', '%I' => 'h', '%l' => 'g', '%M' => 'i', '%p' => 'A', '%P' => 'a',
            '%r' => 'h:i:s A', '%R' => 'H:i', '%S' => 's', '%T' => 'H:i:s', '%X' => 'H:i:s', '%z' => 'O', '%Z' => 'T',
            '%c' => 'D M j H:i:s Y', '%D' => 'm/d/y', '%F' => 'Y-m-d', '%s' => 'U', '%x' => 'm/d/y',
            '%n' => "\n", '%t' => "\t", '%%' => '%',
        ];
        $out = '';
        $len = strlen($format);
        for ($i = 0; $i < $len; $i++) {
            $c = $format[$i];
            if ($c === '%' && $i + 1 < $len) {
                $code = '%' . $format[$i + 1];
                if (isset($map[$code])) {
                    $out .= $map[$code];
                    $i++;
                    continue;
                }
            }
            // Literal characters must be escaped for date()
            $out .= ctype_alpha($c) ? '\\' . $c : $c;
        }
        return $out;
    }

    public function text_filter($str)
    {
        $str = htmlspecialchars($str);
        if (defined('SITE_BAD_WORD_FILTER') && SITE_BAD_WORD_FILTER == 1) {
            $bad_words = conf('BAD_WORDS_ARRAY');
            if ($bad_words === null) {
                $Q = db()->query('SELECT word FROM ' . db('badwords') . '');
                while ($A = db()->fetch_assoc($Q)) {
                    $bad_words[] = $A['word'];
                }
                conf('BAD_WORDS_ARRAY', $bad_words);
            }
            $str = str_replace($bad_words, '', $str);
        }
        return $str;
    }

    public function xsb_decode($string)
    {
        $string = base64_decode($string);
        $out = null;
        for ($i = 0; $i < strlen($string); $i++) {
            $out .= chr(((ord($string[$i]) - ($i % 7)) ^ 0xFF) - ($i % 4));
        }
        return $out;
    }

    public function xsb_encode($string)
    {
        $temp = null;
        for ($i = 0; $i < strlen($string); $i++) {
            $temp .= chr(((ord($string[$i]) + ($i % 4)) ^ 0xFF) + ($i % 7));
        }
        return base64_encode($temp);
    }

    public function __call($name, $args)
    {
        return main()->extend_call($this, $name, $args);
    }

    public function _account_info($account_id)
    {
        $cached_account_info = &main()->_cached_account_info;
        if (is_numeric($account_id)) {
            $account_id = (int) $account_id;
            if ( ! $account_id) {
                return false;
            }
            if ( ! $cached_account_info[$account_id]) {
                $cached_account_info[$account_id] = db()->query_fetch('SELECT * FROM ' . db('host_accounts') . ' WHERE id=' . $account_id);
            }
            $account_info = $cached_account_info[$account_id];
        } elseif (is_array($account_id)) {
            $ids_to_get_info = [];
            $account_info = null;
            foreach ((array) $account_id as $_id) {
                $_id = (int) $_id;
                if (empty($cached_account_info[$_id])) {
                    $ids_to_get_info[] = $_id;
                }
            }
            // all cached: no query (implode(null) was a TypeError)
            $Q = $ids_to_get_info ? db()->query('SELECT * FROM ' . db('host_accounts') . ' WHERE id IN(' . implode(',', $ids_to_get_info) . ')') : null;
            while ($Q && $A = db()->fetch_assoc($Q)) {
                $cached_account_info[$A['id']] = $A;
            }
            foreach ((array) $account_id as $_id) {
                $account_info[$_id] = $cached_account_info[$_id];
            }
        } else {
            return false;
        }
        return $account_info;
    }

    public function _add_login_activity()
    {
        if (MAIN_TYPE_ADMIN) {
            return false;
        }
        if (empty($_SESSION['user_id'])) {
            return false;
        }
        $RECORD_ID = conf('_log_auth_insert_id');
        // Do add activity points
        return common()->_add_activity_points(($_SESSION['user_id'] ?? null), 'site_login', '', $RECORD_ID);
    }

    public function _avatar_exists($user_id = 0, $is_middle = 0)
    {
        $avatar_path = _gen_dir_path($user_id, INCLUDE_PATH . SITE_AVATARS_DIR, 1, 0777) . (int) $user_id . ($is_middle ? '_m' : '') . '.jpg';
        return file_exists($avatar_path);
    }

    public function _check_words_length($text, $length = 0, $do_encode_email = false)
    {
        $_cur_number = null;
        if (empty($length)) {
            $length = 60;
            if (SITE_MAX_WORD_LENGTH != 'SITE_MAX_WORD_LENGTH' && SITE_MAX_WORD_LENGTH != '') {
                $length = SITE_MAX_WORD_LENGTH;
            }
        }
        $source_length = strlen($text);
        if ($source_length < $length) {
            return $text;
        }
        $email_pairs = [];
        $_cur_number = 0;
        // Fast check that we do not have emails inside text
        if (false !== strpos($text, '@')) {
            // Do extract emails from text
            if (preg_match_all('/[\w-]+(\.[\w-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,5})/ims', $text, $m)) {
                foreach ((array) $m[0] as $_cur_email) {
                    $cur_pair_key = '%%' . (++$_cur_number) . '%%';
                    $email_pairs[$_cur_email] = ' ' . $cur_pair_key . ' ';
                    $reverted_pairs[$cur_pair_key] = ' ' . ($do_encode_email ? common()->encode_email($_cur_email) : $_cur_email) . ' ';
                }
                krsort($email_pairs);
                krsort($reverted_pairs);
            }
        }
        // Now we allow URLs in text
        if (preg_match_all('/(http|https|ftp|ftps):\/\/[a-z0-9%&\?_\-\=\.\/]+/ims', $text, $m)) {
            foreach ((array) $m[0] as $_cur_url) {
                $cur_pair_key = '%%' . (++$_cur_number) . '%%';
                $url_pairs[$_cur_url] = ' ' . $cur_pair_key . ' ';
                $reverted_pairs[$cur_pair_key] = ' ' . $_cur_url . ' ';
            }
            krsort($url_pairs);
            krsort($reverted_pairs);
        }
        if ( ! empty($email_pairs)) {
            $text = str_replace(array_keys($email_pairs), array_values($email_pairs), $text);
        }
        if ( ! empty($url_pairs)) {
            $text = str_replace(array_keys($url_pairs), array_values($url_pairs), $text);
        }
        $text = wordwrap($text, (int) $length, ' ', 1);
        if ( ! empty($reverted_pairs)) {
            $text = str_replace(array_keys($reverted_pairs), array_values($reverted_pairs), $text);
        }
        return $text;
    }

    public function _country_name($code = '')
    {
        $countries = conf('countries');
        if ( ! $countries) {
            $countries = main()->get_data('countries');
            conf('countries', $countries);
        }
        if (FEATURED_COUNTRY_SELECT && substr($code, 0, 2) == 'f_') {
            $code = substr($code, 2);
        }
        return isset($countries[$code]) ? $countries[$code] : $code;
    }

    public function _cut_bb_codes($body = '')
    {
        return preg_replace('/\[[^\]]+\]/ims', '', $body);
    }

    public function _day_suffix_eng($timestamp = 0)
    {
        if (empty($timestamp)) {
            $timestamp = time();
        }
        $day_number = (int) gmdate('j', (int) $timestamp);
        if ($day_number >= 11 && $day_number <= 13) {
            return 'th';
        }
        $sufixes = [1 => 'st', 2 => 'nd', 3 => 'rd'];
        return $sufixes[$day_number % 10] ?? 'th';
    }

    public function _debug_log($text, $log_level = false)
    {
        if (is_array($text) || is_object($text)) {
            $text = print_r($text, 1);
        }
        $simple = false;
        if ($log_level == 'simple') {
            $simple = true;
        }
        if ( ! $log_level || ! is_numeric($log_level)) {
            $log_level = E_NOTICE;
        }
        return _class('logs')->_save_debug_log($text, $log_level, []/*array_shift(debug_backtrace())*/, $simple);
    }

    public function _display_name($user_info = [])
    {
        if (is_string($user_info)) {
            return $user_info;
        }
        return empty($user_info['display_name']) ? (empty($user_info['name']) ? $user_info['nick'] : $user_info['name']) : $user_info['display_name'];
    }

    public function _email_link($user_id = 0, $skip_get_array = [], $do_add_get = true)
    {
        $body = _prepare_members_link('./?object=email&action=send_form&id=' . $user_id);
        $body .= ($do_add_get ? common()->add_get_vars(array_merge(['page'], (array) $skip_get_array)) : '');
        return $body;
    }

    public function _error_need_login($go_after_login = '')
    {
        $body = null;
        // Hosting frontend
        if (IS_FRONT == 1) {
            return '';
        }
        if (empty($go_after_login)) {
            $go_after_login = './?object=' . ($_GET['object'] ?? null) . '&action=' . ($_GET['action'] ?? null) . ( ! empty($_GET['id']) ? '&id=' . ($_GET['id'] ?? null) : '') . common()->add_get_vars();
        }
        conf('_force_login_go_url', $go_after_login);
        $body = '';
        if (empty(main()->USER_ID)) {
            $body .= common()->_show_error_message(t('Only for members') . '!');
        }
        $body .= module('login_form')->show();
        return $body;
    }

    public function _exec_in_background($cmd)
    {
        if (substr(PHP_OS, 0, 3) == 'WIN') {
            pclose(popen('start /B ' . $cmd, 'r'));
        } else {
            exec($cmd . ' > /dev/null &');
        }
    }

    public function _filter_text($body, $length = 0)
    {
        return _check_words_length(preg_replace("/([^\s]+)\r\n/i", "\$1 \r\n", $body), $length);
    }

    public function _floatval($val = 0)
    {
        return (float) (str_replace(',', '.', $val));
    }

    public function _format_date($input_date = '', $type = 'short')
    {
        if ( ! strlen($input_date ?? '')) {
            return '';
        }
        $date_short_format = conf('date_short_format');
        $date_long_format = conf('date_long_format');
        // Different date formats
        if (empty($type) || $type == 'short') {
            $date_format = ! empty($date_short_format) ? $date_short_format : 'm/d/y';
        } elseif ($type == 'long') {
            $date_format = ! empty($date_long_format) ? $date_long_format : 'm/d/y H:m';
        } elseif ($type == 'time_only') {
            $date_format = 'h:i A';
        } elseif ($type == 'for_profile') {
            $date_format = 'F d, Y';
            // Custom format. Example: %Y_%m_%d
        } elseif (false !== strpos($type, '%')) {
            $date_format = $type;
            // Unknown named format fallback
        } else {
            $date_format = 'Y-m-d H:i:s';
        }
        if (empty($input_date)) {
            return '';
        }
        $date_to_show = ! is_numeric($input_date) ? strtotime($input_date) : (int) $input_date;
        if (empty($date_to_show)) {
            return '';
        }
        // Formats may still use the strftime() codes (%Y-%m-%d) that older configs and templates rely on
        $output = date($this->strftime_to_date_format($date_format), $date_to_show);
        // Try to catch and replace some basic dates before 1970 year
        if (empty($output) && preg_match('/([0-9]{4})-([0-9]{2})-([0-9]{2})/', $input_date, $m)) {
            if (empty($type) || in_array($type, ['short'])) {
                $r = ['%y' => $m[1], '%m' => $m[2], '%d' => $m[3]];
                $output = str_replace(array_keys($r), array_values($r), $date_format);
            }
        }
        return $output;
    }

    public function _gen_dir_path($id, $path = '', $make = false, $dir_mode = 0755, $create_index_htmls = 1)
    {
        return _class('dir')->_gen_dir_path($id, $path, $make, $dir_mode, $create_index_htmls);
    }

    public function _get_age_from_birth($birth_date = '0000-00-00')
    {
        if (empty($birth_date) || $birth_date == '0000-00-00') {
            return false;
        }
        $tmp = explode('-', $birth_date);
        return (int) (date('Y') - (int) $tmp[0] - (strtotime(date('Y') . '-' . $tmp[1] . '-' . $tmp[2]) > time() ? 1 : 0));
    }

    public function _mkdir_m($path_to_create = '', $dir_mode = 0755, $create_index_htmls = 0, $start_folder = '')
    {
        if (file_exists($path_to_create)) {
            return true;
        }
        return _class('dir')->mkdir_m($path_to_create, $dir_mode, $create_index_htmls, $start_folder);
    }

    public function _mklink($target, $link)
    {
        return _class('dir')->mklink($target, $link);
    }

    public function _my_strip_tags($_text = '')
    {
        return strip_tags($_text, '<a><b><i><u><p><br><strike><span><div><ul><ol><li><h1><h2><h3><h4><h5><h6><table><thead><tbody><th><tr><td>');
    }

    public function _output_cache_trigger($data = [])
    {
        if ( ! main()->OUTPUT_CACHING) {
            return false;
        }
        _class('output_cache')->_exec_trigger($data);
    }

    public function _prepare_for_stpl_exec($source = '')
    {
        return preg_replace('/[^a-z0-9\-\_\s]/ims', '', $source);
    }

    public function _prepare_html($text = '', $need_strip_slashes = 1, $use_smart_function = 1)
    {
        if (is_array($text)) {
            foreach ((array) $text as $k => $v) {
                $text[$k] = $this->_prepare_html($v);
            }
            return $text;
        } elseif ( ! is_string($text)) {
            return $text;
        }
        $have_tr = false;
        $tr_1 = null;
        $tr_2 = null;
        if (DEBUG_MODE) {
            if (main()->INLINE_EDIT_LOCALE && preg_match('/(?P<tag1><span class=[\'"]?localetr[\'"]?[^>]*?>)(?P<body>.+?)(?P<tag2><\/span>)/i', $text, $m)) {
                $tr_1 = $m['tag1'];
                $tr_2 = $m['tag2'];
                $text = substr($text, strlen($tr_1), -strlen($tr_2));
                $have_tr = true;
            }
        }
        if ($need_strip_slashes) {
            $text = stripslashes($text);
        }
        $text = $use_smart_function ? $this->smart_htmlspecialchars($text) : htmlspecialchars($text, ENT_QUOTES);
        if (DEBUG_MODE && $have_tr) {
            $text = $tr_1 . $text . $tr_2;
        }
        $replace = ['{' => '{', '}' => '}', '\\' => '\', '(' => '(', ')' => ')', '?' => '?'];
        return str_replace(array_keys($replace), array_values($replace), $text);
    }

    public function _prepare_members_link($url = '')
    {
        if (main()->USER_ID) {
            return $url;
        }
        $parts = [];
        parse_str(substr($url, 3), $parts);
        if ( ! empty($parts['object'])) {
            return './?object=login_form&go_url=' . $parts['object'] . ( ! empty($parts['action']) ? ';' . $parts['action'] : '') . ( ! empty($parts['id']) ? ';id=' . $parts['id'] : '');
        }
    }

    public function _prepare_phone($phone = '')
    {
        return preg_replace('/[^0-9]/ims', '', $phone);
    }

    public function _profile_link($user_info = 0, $skip_get_array = [], $do_add_get = true)
    {
        if (IS_FRONT == 1) {
            return false;
        }
        $output = '';
        if (is_array($user_info)) {
            $user_id = $user_info['id'];
        } else {
            $user_id = (int) $user_info;
        }
        $output = './?object=user_profile&action=show&id=' . $user_id;
        $output .= ($do_add_get ? common()->add_get_vars(array_merge(['page'], (array) $skip_get_array)) : '');
        $output = process_url($output);
        return $output;
    }

    public function _range($_start = 0, $_end = 10)
    {
        $data = [];
        for ($i = $_start; $i <= $_end; $i++) {
            $data[$i] = $i;
        }
        return $data;
    }

    public function _region_name($region_code = '', $country_code = '')
    {
        $regions = conf('regions');
        if ( ! $regions) {
            $regions = main()->get_data('regions');
            conf('regions', $regions);
        }
        if ( ! strlen($region_code) || empty($country_code)) {
            return $region_code;
        }
        $region_name = $regions[$country_code][$region_code];
        return ! empty($region_name) ? $region_name : $region_code;
    }

    public function _rename($src_filename, $dest_filename)
    {
        if ( ! file_exists($src_filename)) {
            return false;
        }
        $content = file_get_contents($src_filename);
        file_put_contents($dest_filename, $content);
        unlink($src_filename);
        return true;
    }

    public function _server_info($server_id)
    {
        $cached_server_info = &main()->_cached_server_info;
        if (is_numeric($server_id)) {
            $server_id = (int) $server_id;
            if ( ! $server_id) {
                return false;
            }
            if ( ! $cached_server_info[$server_id]) {
                $cached_server_info[$server_id] = db()->query_fetch('SELECT * FROM ' . db('servers') . ' WHERE id=' . $server_id);
            }
            $server_info = $cached_server_info[$server_id];
        } elseif (is_array($server_id) && ! empty($server_id)) {
            $ids_to_get_info = [];
            foreach ((array) $server_id as $_id) {
                $_id = (int) $_id;
                if ( ! $cached_server_info[$_id]) {
                    $ids_to_get_info[] = $_id;
                }
            }
            // all cached: no query (implode(null) was a TypeError)
            $Q = $ids_to_get_info ? db()->query('SELECT * FROM ' . db('servers') . ' WHERE id IN(' . implode(',', $ids_to_get_info) . ')') : null;
            while ($Q && $A = db()->fetch_assoc($Q)) {
                $cached_server_info[$A['id']] = $A;
            }
            foreach ((array) $server_id as $_id) {
                $server_info[$_id] = $cached_server_info[$_id];
            }
        } else {
            return false;
        }
        return $server_info;
    }

    public function _show_avatar($user_id = 0, $user_name = '', $as_link = 0, $is_middle = 0, $only_img_src = 0, $force_link = '')
    {
        $user_info = null;
        if (is_array($user_name)) {
            $user_info = $user_name;
            $user_name = _display_name($user_info);
        }
        $avatar_path = _gen_dir_path($user_id, INCLUDE_PATH . SITE_AVATARS_DIR, 0, 0777) . (int) $user_id . ($is_middle ? '_m' : '') . '.jpg';
        $photo_src = file_exists($avatar_path) && filesize($avatar_path) ? str_replace(INCLUDE_PATH, WEB_PATH, $avatar_path) : '';
        if ($only_img_src) {
            return ! empty($photo_src) ? $photo_src : '';
        }
        $use_ajax = conf('no_ajax_here') ? 0 : 1;
        if (conf('HIGH_CPU_LOAD') == 1) {
            $use_ajax = 0;
        }
        $replace = [
            'user_name' => $user_name,
            'custom_title' => _prepare_html(conf('avatar_custom_title')),
            'user_id' => $user_id,
            'photo_src' => $photo_src,
            'user_details_link' => ! empty($force_link) ? process_url($force_link) : _profile_link(is_array($user_info) ? $user_info : $user_id, null, MAIN_TYPE_ADMIN ? 1 : 0),
            'as_link' => (int) ((bool) $as_link),
            'is_middle' => (int) ((bool) $is_middle),
            'no_photo_small' => ! $is_middle && empty($photo_src),
            'no_photo_middle' => $is_middle && empty($photo_src),
            'use_ajax' => (int) $use_ajax,
        ];
        $body = tpl()->parse('avatar_img', $replace);
        return str_replace(["\r", "\n", "\t"], '', trim($body));
    }