Timed/On-Request Cache

<?php
function fetchInfo($gt) {
  $key = "********************************************";
  $file = file_get_contents("http://www.bungie.net/api/reach/reachapijson.svc/player/details/nostats/".$key."/".$gt);
  $json = json_decode($file, true);
  unset($file, $key);

  $cache[] = time();
  $cache[] = $json['Player']['armor_completion_percentage']; // Obvious
  $cache[] = $json['Player']['commendation_completion_percentage']; // Obvious
  $cache[] = $json['Player']['games_total']; // Games played
  $cache[] = $json['Player']['service_tag']; // Obvious
  $date = preg_match("#\/Date\((.+?)-(.+?)\)\/#i", $json['Player']['last_active'], $match);
  $cache[] = $match[1] / 1000;

  return $cache;
  }

$gt = "halo2freeek";

$cachefile = "./" . md5($gt) . "_cache.txt";
$newCache = false;
$newFile = false;
if(file_exists($cachefile)) {
  // The cache file exists, we need to read it's contents and
  // Check if the timestamp is greater than one hour ago.
  $file = file_get_contents($cachefile);
  $cache = explode("#|#", $file);
  unset($file);
  $cacheTime = $cache[0];
  $timeDiff = time() - $cacheTime;
  if($timeDiff > 300) {
    // It has been more than an hour since this cache file was created
    // So we recreate it with updated information from the API

    echo "The cache file was older than 5 minutes, so we'll refresh it.<br><br>\n\n";

    $cache = fetchInfo($gt);
    $newCacheTime = $cache[0];
    $timeDiff = time() - $newCacheTime;
    $newCache = true;
    $str = implode("#|#", $cache);
    file_put_contents($cachefile, $str);
    unset($str);

    // We still have the $cache variable which has overwritten the
    // Original and now holds NEW information.
    } else {
    // It has been less than an hour, so we're going to just read the
    // Cache file's contents and use that information in our image

    echo "The cache file was younger than 5 minutes, so we'll use its contents.<br><br>\n\n";

    // We're just going to print the existing information now, for
    // Example purposes.
    }
  } else {
  // The cache file doesn't exist, so we'll need to grab the
  // Information from the API and create a cache file.

  echo "The cache file doesn't exist, so we'll create it.<br><br>\n\n";

  $cache = fetchInfo($gt);
  $newCacheTime = $cache[0];
  $timeDiff = time() - $newCacheTime;
  $newCache = true;
  $newFile = true;
  $str = implode("#|#", $cache);
  file_put_contents($cachefile, $str);
  unset($str);

  // We still have the $cache variable which has overwritten the
  // Original and now holds NEW information.
  }

echo "<pre>";
foreach($cache as $key => $inf) {
  switch($key) {
    case 0:
      echo "Cache Time: ";
      break;
    case 1:
      echo "Armory Completion: ";
      break;
    case 2:
      echo "Commendation Completion: ";
      break;
    case 3:
      echo "Games Played: ";
      break;
    case 4:
      echo "Service Tag: ";
      break;
    case 5:
      echo "Last Active: ";
      break;
    }

  if($key != 5) {
    echo $inf;
    } else {
    echo date($mydate, $inf);
    }

  echo "\n";
  }

echo "</pre>Raw Array: <br><br>";

echo "<pre>";
print_r($cache);
echo "</pre>";

echo "The current time is <b>" . date($mydate) . "</b> (" . time() . ")<br>\n";
echo "The previous cache was " . (($newFile) ? " <b>never</b>.<br>\n" : "on <b>" . date($mydate, $cacheTime) . "</b> (" . $cacheTime . ")<br>\n");
echo (($newCache) ? "The most recent cache was <b>right now.</b><br>\n" : "");
echo "The difference between those times is <b>" . $timeDiff . "</b> seconds.<br>\n";
echo "The next cache will occur after the page has been refreshed in <b>" . (300 - $timeDiff) . "</b> seconds.";
?>