Added example functions for attribute alter

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@286 44740490-163a-0410-bde0-09ae8108e29a

attributealter/alterfunctions.php

+<?php
+
+
+function attributealter_test(&$attributes, $spentityid = null, $idpentityid = null) {
+	$attributes['injected'] = array('newvalue');
+}
+
+function attributealter_realm(&$attributes, $spentityid = null, $idpentityid = null) {
+
+	if (array_key_exists('eduPersonPrincipalName', $attributes)) {
+		$eduppn = $attributes['eduPersonPrincipalName'][0];
+		$splitted = explode('@', $eduppn);
+		if (count($splitted) > 1) {
+			$attributes['realm'] = array($splitted[1]);
+		}
+	}
+
+}
+