WordPress - Add a custom menu item to the WordPress admin menu, for a user with administrator capability - Using WordPress Plugin development

You have to create a plugin first, say create a directory named "plugin1" under "wp-content/plugins" directory. Create a file named "plugin1.php" using following content:

<?php /** * Plugin Name: plugin1 * Plugin URI: https://www.your-site.com/ * Description: Test. * Version: 1.0.1 * Author: Plugin Owner Name * Author URI: https://www.your-site.com/ **/ function register_my_custom_menu_page() { add_menu_page( __( 'Custom Menu Title', 'textdomain' ), 'Custom Menu', 'manage_options', 'plugin1/home.php', '', plugins_url( 'plugin1/images/home2.png' ), 6 ); } // This command will add menu at left bar of admin panel add_action( 'admin_menu', 'register_my_custom_menu_page' ); // This will add stylesheet wp_enqueue_style( 'plugin1.main.css', plugins_url( 'plugin1/main.css' ), false, '1.1', 'all');

Create an directory inside that directory "images" and put an image which will appear as menu icon in the admin menu panel, my structure is like as:

Go to "http://localhost/plugin-development/wp-admin/plugins.php" to activate your Plugin. Above code will add a left menu with icon to the menubar as below:

Once you click on the menu item, it will take you to the "plugin1/home.php" page which will looks like below: