Sindbad~EG File Manager

<?php

/**
 * Function that creates the sub-menu item and page for the extra tools page.
 */
function dpsp_register_extensions_subpage() {
	add_submenu_page( 'dpsp-social-pug', __( 'Extensions', 'social-pug' ), '<span style="color: orange;">' . __( 'Extensions', 'social-pug' ) . '</span>', 'manage_options', 'dpsp-extensions', 'dpsp_extensions_subpage' );
}

/**
 * Function that adds content to the extensions subpage.
 */
function dpsp_extensions_subpage() {
	$sub_page = ( isset( $_GET['sub-page'] ) ) ? strip_tags( $_GET['sub-page'] ) : ''; 
	if ( 'opt-in-hound' === $sub_page ) {
		include_once 'views/view-submenu-page-extensions-sub-page-opt-in-hound.php';
	} else {
		include_once 'views/view-submenu-page-extensions.php';
	}
}