WooCommerce My Account Tab Generator

<?php
/**
 * The "Rewards" tab on the My Account page.
 */

/**
 * Registers the endpoint. This is what makes /my-account/rewards/ resolve.
 */
function my_store_add_endpoint() {
	add_rewrite_endpoint( 'rewards', EP_ROOT | EP_PAGES );
}
add_action( 'init', 'my_store_add_endpoint' );

/**
 * Tells WordPress the endpoint is a query var it should keep.
 *
 * @param array $vars Public query vars.
 * @return array
 */
function my_store_query_vars( $vars ) {
	$vars[] = 'rewards';

	return $vars;
}
add_filter( 'query_vars', 'my_store_query_vars', 0 );

/**
 * Adds the menu item.
 *
 * @param array $items Menu items, keyed by endpoint.
 * @return array
 */
function my_store_menu_items( $items ) {
	$new = array(
		'rewards' => __( 'Rewards', 'my-store' ),
	);

	// Logout belongs at the end, so lift it off, append, and put it back.
	$logout = array();

	if ( isset( $items['customer-logout'] ) ) {
		$logout['customer-logout'] = $items['customer-logout'];

		unset( $items['customer-logout'] );
	}

	return array_merge( $items, $new, $logout );
}
add_filter( 'woocommerce_account_menu_items', 'my_store_menu_items' );

/**
 * The browser title on that tab.
 *
 * @param string $title Current title.
 * @return string
 */
function my_store_endpoint_title( $title ) {
	return __( 'Your rewards', 'my-store' );
}
add_filter( 'woocommerce_endpoint_rewards_title', 'my_store_endpoint_title' );

/**
 * Prints the tab content.
 *
 * The hook name carries the endpoint slug, so renaming the slug renames this
 * hook too.
 */
function my_store_endpoint_content() {
	echo '<p>' . esc_html__( 'Everything you have earned so far.', 'my-store' ) . '</p>';

	// Your content here.
}
add_action( 'woocommerce_account_rewards_endpoint', 'my_store_endpoint_content' );

/**
 * Registers the endpoint and rewrites the rules once, on activation.
 *
 * Without this the URL is a 404 until someone opens Settings, Permalinks.
 */
function my_store_activate() {
	my_store_add_endpoint();

	flush_rewrite_rules();
}
register_activation_hook( __FILE__, 'my_store_activate' );

/**
 * Clears the rule again so the URL stops resolving.
 */
function my_store_deactivate() {
	flush_rewrite_rules();
}
register_deactivation_hook( __FILE__, 'my_store_deactivate' );