php authentication methods and examples. http auth

diff --git a/authentication/README b/authentication/README
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+Simple examples about some authentication methods / user login in PHP
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diff --git a/authentication/http-auth.php b/authentication/http-auth.php
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+<?php
+/**
+ *  dolphin. Collection of useful PHP skeletons.
+ *  Copyright (C) 2012  Johannes 'Banana' Keßler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the COMMON DEVELOPMENT AND DISTRIBUTION LICENSE
+ *
+ * You should have received a copy of the
+ * COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+ * along with this program.  If not, see http://www.sun.com/cddl/cddl.html
+ */
+
+/**
+ * simple HTTP auth method with PHP
+ * more details can be found here:
+ * http://php.net/manual/en/features.http-auth.php
+ */
+
+if (!isset($_SERVER['PHP_AUTH_USER'])) {
+    header('WWW-Authenticate: Basic realm="My secret base"');
+    header('HTTP/1.0 401 Unauthorized');
+    echo 'You canceled the auth process. Reload the page to get the box again.';
+    exit;
+} else {
+    echo "<p>Hello ".$_SERVER['PHP_AUTH_USER'].".</p>";
+    echo "<p>You entered ".$_SERVER['PHP_AUTH_PW']." as your password.</p>";
+}
+?>
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