update intro text description on the admin bar

admin-bar-intro-text.php

<?php
add_action( 'admin_bar_menu', 'myprefix_filter_profile_intro_text', 9992 );
/**
 * Modify the "Howdy" to something an adult would say.
 *
 * @param  WP_Admin_Bar $wp_admin_bar  The global WP_Admin_Bar object.
 *
 * @return void.
 */
function myprefix_filter_profile_intro_text( $wp_admin_bar ) {

	// Get the account link.
	$my_account = $wp_admin_bar->get_node( 'my-account' );

	// Bail if this isn't around.
	if ( empty( $my_account ) || ! is_object( $my_account ) || empty( $my_account->title ) ) {
		return;
	}

	// If "Howdy" isn't there, someone else modded it, so don't try.
	if ( ! str_contains( $my_account->title, 'Howdy' ) ) {
		return;
	}

	// Begin by stripping the "Howdy" part.
	$base_title = str_replace( 'Howdy,', '', $my_account->title );
	$base_title = ltrim( $base_title );

	// Now get the current hour.
	$current_hr = current_time( 'G', false );

	// Set our new prefix.
	$new_prefix = __( 'Hello', 'my-text-domain' );

	// Now do some building.
	switch ( $current_hr ) {

		// Handle late evening.
		case $current_hr < 3:
			$new_prefix = __( 'Good Evening', 'my-text-domain' );
			break;

		// Handle morning.
		case $current_hr >= 3 && $current_hr < 12:
			$new_prefix = __( 'Good Morning', 'my-text-domain' );
			break;

		// Handle afternoon.
		case $current_hr >= 12 && $current_hr < 17:
			$new_prefix = __( 'Good Afternoon', 'my-text-domain' );
			break;

		// Handle evening.
		case $current_hr >= 17 && $current_hr < 25:
			$new_prefix = __( 'Good Evening', 'my-text-domain' );
			break;
	}

	// Now update the title.
	$wp_admin_bar->add_node( [
		'id'    => 'my-account',
		'title' => $new_prefix . ', ' . $base_title,
	] );
};