Added a proper arithmetic clockhands solution.

Author: Undalevein

php/clockhands.php

@@ -1,5 +1,9 @@
 <?php
     for ($i = 0 ; $i < 11 ; $i++){
-        echo gmstrftime("%I:%M:%S\n", ($i + 0.5) * 43200.0/11);
+        $t = (43200 * $i + 21600) / 11
+        $h = $t / 3600
+        $m = $t / 60 % 60
+        $s = $t % 60
+        sprintf("%02d:%02d:%02d",  $h || 12, $m, $s);
     }
 ?>

php/clockhands_time.php

@@ -0,0 +1,5 @@
+<?php
+    for ($i = 0; $i < 11; $i++) {
+        echo gmstrftime("%I:%M:%S", ($i+0.5) * 43200.0/11) . "\n";
+    }
+?>