Summary

• Step 1: create page from WordPress admin and note the url slug
• Step 2: create a file in your active theme named 'page-url-slug.php'
• Step 3: load WordPress header and footer in the file

• Step 1: call add_action 'admin_menu'
• Step 2: create custom function for the new link

Step 1: call add_action 'admin_menu'

add_action( 'admin_menu', 'register_example_custom_menu_link_menu_page' );

• Method 1: by global $current_user for the current user logged in
• Method 2: check if an user has a specific role by SQL query

Method 1: by global $current_user for the current user logged in

/**
 * Checks if current user has administrator role
 * @return boolean
 */

Summary

• Step 1: make some string in your plugin translatable
• Step 2: load the function with add_action 'init' in your plugin
• Step 3: create folder and file for translations inside your plugin
• Step 4: update your language files with poedit

In the example, we are going to translate the plugin to Spanish.