Viên ngọc phương Đông

<?php

class BackWPup_Help
{
 public static function help()
 {
 if (method_exists(get_current_screen(), 'add_help_tab')) {
 get_current_screen()->add_help_tab([
 'id' => 'plugininfo',
 'title' => __('Plugin Info', 'backwpup'),
 'content' => ' ' . str_replace('\"', '"', sprintf(_x('%1$s version %2$s. A project by <a href="https://wp-media.me">WP Media</a>.', 'Plugin name and link; Plugin Version', 'backwpup'), '<a href="' . esc_attr__('http://backwpup.com', 'backwpup') . '">' . BackWPup::get_plugin_data('Name') . '</a>', BackWPup::get_plugin_data('Version'))) . ''
 . '' . esc_html__('BackWPup comes with ABSOLUTELY NO WARRANTY. This is a free software, and you are welcome to redistribute it under certain conditions.', 'backwpup') . '',
 ]);

$text_help_sidebar = '' . __('For more information:', 'backwpup') . '';
 $text_help_sidebar .= '<a href="' . esc_attr__('http://backwpup.com', 'backwpup') . '">' . BackWPup::get_plugin_data('Name') . '</a>';
 $text_help_sidebar .= '<a href="http://wordpress.org/extend/plugins/backwpup/">' . esc_html__('Plugin on wordpress.org', 'backwpup') . '</a>';
 $text_help_sidebar .= '<a href="' . esc_attr__('https://backwpup.com/docs/', 'backwpup') . '">' . esc_html__('Manual', 'backwpup') . '</a>';

get_current_screen()->set_help_sidebar($text_help_sidebar);
        }
    }

/**
     * @static
     *
     * @param array $tab
     */
    public static function add_tab($tab = [])
    {
        if (method_exists(get_current_screen(), 'add_help_tab')) {
            get_current_screen()->add_help_tab($tab);
        }
    }
}