README

Register the module. (to be able to use the ViewHelper)

config/modules.config.php

'modules' => array(
    '...',
     'Laminas\Mvc\Plugin\FlashMessenger',
     'Juuce\Laminas\Flashmessenger'
),

Installer

Add this to your layout.phtml file. Should already have inlineScript() so above that

 <?php $this->FlashMsg(); ?>
 <?php echo $this->inlineScript() ?>

Utilisation

Add for each message type
4 types available

<?php
$this->flashMessenger()->addSuccessMessage('Sample success message');
$this->flashMessenger()->addErrorMessage('Sample error message');
$this->flashMessenger()->addInfoMessage('Sample Info message');
$this->flashMessenger()->addWarningMessage("Sample warning message");