PHP nice looking notification boxes

<?php
/**
* Show notification boxes
*
* @param type $aMessages
* @return string
*/
function showMessage($aMessages) {
/*
$aMessages['lightbulb'][] = "Sample lightbulb message"; // Default type of message
$aMessages['success'][] = "Sample success message";
$aMessages['messages'][] = "Sample messages message";
$aMessages['information'][] = "Sample information message";
$aMessages['warning'][] = "Sample warning message";
$aMessages['failure'][] = "Sample failure message";
*/
$out = '';
if(isset($aMessages) && count($aMessages)>0) {
foreach($aMessages as $type=>$messages) {
foreach($messages as $info) {
switch($type) {
case 'warning': $class = 'warning'; $title = 'Warning!'; break;
case 'success': $class = 'success'; $title = 'Success!'; break;
case 'failure': $class = 'failure'; $title = 'Failure!'; break;
case 'information': $class = 'information'; $title = 'Information!'; break;
case 'messages': $class = 'messages'; $title = 'Message!'; break;
default: $class = 'lightbulb'; $title = 'Tip!'; break;
}
$out .= '<div class="notification '.$class.'"><p><strong>'.$title.'</strong>'.$info.'</p></div>';
}
}
return $out;
}
}
?>