Change the directory of pgn4web from '_assets' to static 'assets'.

assets/vendor/pgn4web/gotd.php

@@ -0,0 +1,56 @@
+<?php
+
+/*
+ *  pgn4web javascript chessboard
+ *  copyright (C) 2009-2013 Paolo Casaschi
+ *  see README file and http://pgn4web.casaschi.net
+ *  for credits, license and more details
+ */
+
+error_reporting(E_ALL | E_STRICT);
+
+function get_param($param, $shortParam, $default) {
+  if (isset($_REQUEST[$param])) { return $_REQUEST[$param]; }
+  if (isset($_REQUEST[$shortParam])) { return $_REQUEST[$shortParam]; }
+  return $default;
+}
+
+$pgnData = get_param("pgnData", "pd", "gotd.pgn");
+
+
+function get_pgnText($pgnUrl) {
+  if (strpos($pgnUrl, ":") || (strpos($pgnUrl, "%3A"))) { return "[Event \"error: invalid pgnData=$pgnUrl\"]\n"; }
+  $fileLimitBytes = 10000000; // 10Mb
+  $pgnText = file_get_contents($pgnUrl, NULL, NULL, 0, $fileLimitBytes + 1);
+  if (!$pgnText) { return "[Event \"error: failed to get pgnData=$pgnUrl\"]\n"; }
+  $pgnText = str_replace(array("&", "<", ">"), array("&amp;", "&lt;", "&gt;"), $pgnText);
+  return $pgnText;
+}
+
+$pgnText = get_pgnText($pgnData);
+
+$numGames = preg_match_all("/(\s*\[\s*(\w+)\s*\"([^\"]*)\"\s*\]\s*)+[^\[]*/", $pgnText, $games );
+
+
+$gameNum = get_param("gameNum", "gn", "");
+
+$expiresDate = "";
+if ($gameNum == "random") { $gameNum = rand(1, $numGames); }
+else if (!preg_match("/^\d+$/", $gameNum)) {
+  $timeNow = time();
+  $expiresDate = gmdate("D, d M Y H:i:s", (floor($timeNow / (60 * 60 * 24)) + 1) * (60 * 60 * 24)) . " GMT";
+  if (!preg_match("/^[ +-]\d+$/", $gameNum)) { $gameNum = 0; } // space is needed since + is urldecoded as space
+  $gameNum = floor(($gameNum + ($timeNow / (60 * 60 * 24))) % $numGames) + 1;
+}
+else if ($gameNum < 1) { $gameNum = 1; }
+else if ($gameNum > $numGames) { $gameNum = $numGames; }
+$gameNum -= 1;
+
+header("content-type: application/x-chess-pgn");
+header("content-disposition: inline; filename=game.pgn");
+if ($expiresDate) {
+  header("expires: " . $expiresDate);
+}
+print $games[0][$gameNum];
+
+?>