initial commit

CacheInterface.php

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+<?php
+
+interface CacheInterface
+{
+    function retrieve($key);
+
+    function contains($key);
+
+    function store($key, $data, $TTL = 0);
+
+    function remove($key);
+}

LogInterface.php

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+<?php
+
+interface LogInterface
+{
+    function err($message);
+
+    function warn($message);
+
+    function notice($message);
+
+    function info($message);
+
+    function debug($message);
+}

README.md

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+What is this?
+=============
+
+Just two examples for interfaces for common tasks that might not cover every imaginable
+use case but still would provide quite a lot of benefit if users could rely on any
+lib they use having implemented these interfaces.