[WordPress] Sample Admin Notices

sample-admin-notice.php

<?php
defined( 'ABSPATH' ) or die( 'Poop.' );
/**
 * Plugin Name: _Sample Admin Notice
 * Description: Displays a sample admin notice once for admins. (Requires PHP 5.3+.)
 * Version:     0.1
 * Author:      Caspar Hübinger
 * Plugin URI:  https://gist.github.com/glueckpress/6befeb937da89025d4d8#file-sample-admin-notice-php
 * Author URI:  https://profiles.wordpress.org/glueckpress
 * License:     GNU General Public License v3
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */

 if ( version_compare( phpversion(), '5.3' ) < 0 )
	 return;

/**
 * Render sample admin notice.
 * @param  string $message Message text (HTML)
 * @param  string $classes CSS classes, separate by spaces
 * @return void
 */
function sample_admin_notice__render_notice( $message = '', $classes = 'notice-success' ) {

	if ( ! empty( $message ) ) {
		printf( '<div class="notice %2$s">%1$s</div>', $message, $classes );
	}
}

/**
 * Display admin notice once, then never again.
 * @return void
 */
function sample_admin_notice() {

	$maybe_display_notice = get_option( 'sample_admin_notice__status', 'activating' );

	if ( 'activating' === $maybe_display_notice && current_user_can( 'manage_options' ) ) {

		add_action( 'admin_notices', function() {
 
			$user    = $GLOBALS['current_user'];
			$message = sprintf( '<p><strong>Sample Admin Notice</strong> funzt, %s!</p>', $user->display_name );

			sample_admin_notice__render_notice( $message, 'notice-info is-dismissible' );
		} );

		update_option( 'sample_admin_notice__status', 'activated' );
	}
}
add_action( 'init', 'sample_admin_notice' );

sample-admin-notice__success.html

<div class="notice notice-success">
	<p>All is well.</p>
</div>

sample-admin-notice__success.php

<?php
/**
 * Simple Admin Notice
 * @return void
 */
function sample_admin_notice__success() { ?>
	<div class="notice notice-success">
		<p><strong>Works!</strong></p>
	</div>
<?php
}
add_action( 'admin_notices', 'sample_admin_notice__success' );

sample-admin-notice__success_is-dismissible.html

<div class="notice notice-success is-dismissible">
	<p>All is well.</p>
</div>

sample-admin-notice__success_reusable.php

<?php
/**
 * Render sample admin notice.
 * @param  string $message Message text (HTML)
 * @param  string $classes CSS classes, separate by spaces
 * @return void
 */
function sample_admin_notice__render_notice( $message = '', $classes = 'notice-success' ) {

	if ( ! empty( $message ) ) {
		printf( '<div class="notice %2$s">%1$s</div>', $message, $classes );
	}
}

sample-admin-notice__success_reusable_with-option.php

<?php
/**
 * Display admin notice once, then never again.
 * @uses   sample_admin_notice__render_notice()
 * @return void
 */
function sample_admin_notice() {

	$maybe_display_notice = get_option( 'sample_admin_notice__status', 'activating' );

	if ( 'activating' === $maybe_display_notice && current_user_can( 'manage_options' ) ) {

		add_action( 'admin_notices', function() {
 
			$user    = $GLOBALS['current_user'];
			$message = sprintf( '<p><strong>Sample Admin Notice</strong> funzt, %s!</p>', $user->display_name );

			sample_admin_notice__render_notice( $message, 'notice-info is-dismissible' );
		} );

		update_option( 'sample_admin_notice__status', 'activated' );
	}
}
add_action( 'init', 'sample_admin_notice' );

sample-admin-notice__update-nag.php

<?php
/**
 * DON’T USE!
 * No good for use in plugins/themes: .update-nag.
 * @return void
 */
function sample_admin_notice__update_nag() { ?>
	<div class="update-nag">
		<p><code>.update-nag</code> would trigger this notice to be displayed above site titles in WP Admin.</p>
	</div>
<?php
}
add_action( 'admin_notices', 'sample_admin_notice__update_nag' );

sample-admin-notice__update-nag_notice.php

<?php
/**
 * DON’T USE!
 * Worse than .update-nag, as it fails to clear.
 * @return void
 */
function sample_admin_notice__update_nag_notice() { ?>
	<div class="update-nag notice">
		<p>Doesn’t clear well: <code>.update-nag.notice</code> will turn WP Admin into a mess.</p>
	</div>
<?php
}
add_action( 'admin_notices', 'sample_admin_notice__update_nag_notice' );

i'm using admin_notices action hook after WordPress custom menu page form submission with object oriented method so what can i do for that. but still not response action hook didn't run with inside of public function so what can i do

How to display admin_notice from my plugin PHP file
because I write this code in my other function but this action not called
add_action( 'admin_notices', 'call_notice'); function call_notice(){ echo '<div class="notice notice-error is-dismissible"> <p><b style="font-size:15px;">You are Called.</b></p> </div>'; }
I put add action in my else part (when if condition became wrong)