PclZip::errorInfo PHP Метод

    public function errorInfo($p_full = false)
    {
        if (PCLZIP_ERROR_EXTERNAL == 1) {
            return PclErrorString();
        } else {
            if ($p_full) {
                return $this->errorName(true) . ' : ' . $this->error_string;
            } else {
                return $this->error_string . ' [code ' . $this->error_code . ']';
            }
        }
    }

function create_zip($themeName)
{
    $exclude_files = array('.', '..', '.svn', 'thumbs.db', '!sources', 'style.less.cache', 'bootstrap.less.cache', '.gitignore', '.git');
    $all_themes_dir = str_replace('\\', '/', get_theme_root());
    $backup_dir = str_replace('\\', '/', WP_CONTENT_DIR) . '/themes_backup';
    $zip_name = $backup_dir . "/" . $themeName . '.zip';
    $backup_date = date("F d Y");
    if (is_dir($all_themes_dir . "/" . $themeName)) {
        $file_string = scan_dir($all_themes_dir . "/" . $themeName, $exclude_files);
    }
    if (function_exists('wp_get_theme')) {
        $backup_version = wp_get_theme($themeName)->Version;
    } else {
        $backup_version = get_current_theme($themeName)->Version;
    }
    if (!is_dir($backup_dir)) {
        if (mkdir($backup_dir, 0700)) {
            $htaccess_file = fopen($backup_dir . '/.htaccess', 'a');
            $htaccess_text = 'deny from all';
            fwrite($htaccess_file, $htaccess_text);
            fclose($htaccess_file);
        }
    }
    $zip = new PclZip($zip_name);
    if ($zip->create($file_string, PCLZIP_OPT_REMOVE_PATH, $all_themes_dir . "/" . $themeName) == 0) {
        die("Error : " . $zip->errorInfo(true));
    }
    update_option($themeName . "_date_backup", $backup_date, '', 'yes');
    update_option($themeName . "_version_backup", $backup_version, '', 'yes');
    echo $backup_date . "," . $backup_version;
}