add admin notice on wordpress

The solution for this is noted below

add admin notice on wordpress

Solution

// Add admin notice
function my_custom_admin_notice() {
    $message = 'This is my custom admin notice.';
    ?>
    <div class="notice notice-success is-dismissible">
        <p><?php echo $message; ?></p>
    </div>
    <?php
}
add_action( 'admin_notices', 'my_custom_admin_notice' );

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