Display the number of keys scanned (erikdubbelboer#210)

* Display the number of keys scanned and the limit

* Reduce scansize according to scanmax

* Simplify info about scanmax

Author: LeoHsiao1

index.php

@@ -10,20 +10,18 @@
     } else {
         $next = 0;
         $keys = array();
-
+        $scansize = $server['scansize'];
         while (true) {
-            $r = $redis->scan($next, 'MATCH', $server['filter'], 'COUNT', $server['scansize']);
-
+            $r = $redis->scan($next, 'MATCH', $server['filter'], 'COUNT', $scansize);
             $next = $r[0];
             $keys = array_merge($keys, $r[1]);
-
-            if (count($keys) >= $server['scanmax']) {
+            if ($next == 0) {
                 break;
             }
-
-            if ($next == 0) {
+            if (count($keys) >= $server['scanmax']) {
                 break;
             }
+            $scansize = min($server['scanmax'] - count($keys), $server['scansize']);
         }
     }
 
@@ -256,6 +254,9 @@ function getDbInfo($d, $info, $padding = '') {
 </button>
 </div>
 <div id="keys">
+<div class="info">
+  scaned <?php echo count($keys) ?> keys<?php echo (count($keys) >= $server['scanmax']) ? ', reached scanmax' : '' ?>
+</div>
 <ul>
 <?php print_namespace($namespaces, 'Keys', '', empty($namespaces))?>
 </ul>