Cakephp3 pass (custom) validation to flash message - validation

Question

It is simple to pass a message to flash via:
$this->Flash->error(__('The user could not be saved. Please, try again.'));
But when there are more errors from:
$package->errors();
I use just a simple foreach loop:
foreach ($package->errors() as $error=>$value)
{
foreach ($value as $single_error)
{
$error_array[] = ($single_error);
}
}
Then I pass it to a flash element:
$this->Flash->custom($error_array, [
'key' => 'custom']);
And in the flash message:
if ($message > 0) {
foreach ($message as $m) {
echo h($m).'<br />';
}
} else {
echo h($message);
}
I wonder it here is a better way of handling an array of validation errors.

Answer 1

I am using the following method if there are errors:
Controller:
$errors = $action->errors();
$errorMessages = [];
array_walk_recursive($errors, function($a) use (&$errorMessages) { $errorMessages[] = $a; });
$this->Flash->error(__('Your action cannot be saved!'), ['params' => ['errors' => $errorMessages]]);
Template/Element/Flash/error.tcp:
<?php if (isset($params) AND isset($params['errors'])) : ?>
<ul class="collection with-header">
<li class="collection-header"><h5><?= __('The following errors occurred:') ?></h5></li>
<?php foreach ($params['errors'] as $error) : ?>
<li class="collection-item"><i class="material-icons">error</i><?= h($error) ?></li>
<?php endforeach; ?>
</ul>
<?php endif; ?>
Result:
Just for anyone interested, I am using MaterializeCSS.