function DrupalFileCache::delete_expired in File Cache 7

Delete expired cache entries.

2 calls to DrupalFileCache::delete_expired()

DrupalFileCache::clear in ./filecache.inc

Expire data from the cache. If called without arguments, expirable entries will be cleared from the cache_page and cache_block bins.

DrupalFileCache::delete_flushed in ./filecache.inc

Delete flushed cache entries.

File

./filecache.inc, line 496

DrupalFileCache class that implements DrupalCacheInterface.

Class

DrupalFileCache

Code

function delete_expired($cache_flush = NULL) {
  if (!isset($cache_flush)) {
    $cache_flush = REQUEST_TIME;
  }
  $cache_size = 0;
  foreach ($this
    ->all() as $filename) {
    $pathname = $this->directory . '/' . $filename;

    // gather statistics
    $stat = @stat($pathname);
    if ($stat === FALSE || is_dir($pathname)) {
      continue;
    }
    $file_size = $stat['blocks'] >= 0 ? $stat['blocks'] * 512 : $stat['size'];
    $cache_size += $file_size;
    $content = @file_get_contents($pathname);
    if ($content === FALSE) {
      continue;
    }
    $cache = @unserialize($content);
    if ($cache === FALSE) {
      continue;
    }
    if ($cache->expire == CACHE_PERMANENT) {
      continue;
    }
    $expiry_date = $cache->expire;
    if ($cache->expire == CACHE_TEMPORARY) {
      $expiry_date = $cache->created + variable_get('cache_lifetime', 0);
    }
    if ($expiry_date < $cache_flush) {
      @unlink($pathname);
      $cache_size -= $file_size;
    }
  }

  // foreach $filename
  return $cache_size;
}