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wp-flash-messages

Simple flash message functionality for your WordPress plugin.

Use the function queue_flash_message() to enqueue a flash message that will be displayed on the next admin page load.

queue_flash_message() takes the following form:

<?php queue_flash_message( $message, $class = 'updated' ); ?>

The two parameters are:

  • $message - The string to be displayed. HTML is okay, but keep in mind that your $message will be wrapped in a p and a div tag. (See output example below.)
  • $class - the CSS class to be applied to the div element.

The output will look like this:

<div class="$class">
	<p>$message</p>
</div>

This is the same markup that WordPress generates for its own flash messages.

By default, only the two built-in messages classes of updated and error are allowed, but you can modify the array of allowed classes using the flash_messages_allowed_classes filter, like so:

function my_flash_classes($allowed_classes) {
    $allowed_classes[] = 'notice'; //adds 'notice' class to allowed array
    return $allowed_classes;
}
add_filter('flash_messages_allowed_classes', 'my_flash_classes');

If an invalid class name is used when queueing a message, the default class updated is used instead. Of course, you can also change this with a filter:

function my_flash_default_class($default_class_name) {
    return 'error'; //makes 'error' the default class name
}
add_filter('flash_messages_default_class', 'my_flash_default_class');

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Simple flash message functionality for your WordPress plugin.

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