Retwis ported to modern Redis data types.

The example (and related documentation at redis.io) was not updated for
5 years. Redis had no sorted sets and hashes when the original code was
written (!). An update was really needed.

We also use a modern PHP client now: Predis. A copy is shipped within
this repository to make life easier to newcomers trying Redis for the
first time via this example.

home.php

@@ -0,0 +1,28 @@
+<?
+include("retwis.php");
+if (!isLoggedIn()) {
+    header("Location: index.php");
+    exit;
+}
+include("header.php");
+$r = redisLink();
+?>
+<div id="postform">
+<form method="POST" action="post.php">
+<?=utf8entities($User['username'])?>, what you are doing?
+<br>
+<table>
+<tr><td><textarea cols="70" rows="3" name="status"></textarea></td></tr>
+<tr><td align="right"><input type="submit" name="doit" value="Update"></td></tr>
+</table>
+</form>
+<div id="homeinfobox">
+<?=$r->zcard("followers:".$User['id'])?> followers<br>
+<?=$r->zcard("following:".$User['id'])?> following<br>
+</div>
+</div>
+<?
+$start = gt("start") === false ? 0 : intval(gt("start"));
+showUserPostsWithPagination(false,$User['id'],$start,10);
+include("footer.php")
+?>