4.6.x bootstrap.inc cache_set($cid, $data, $expire = CACHE_PERMANENT, $headers = NULL)
4.7.x bootstrap.inc cache_set($cid, $data, $expire = CACHE_PERMANENT, $headers = NULL)
5.x cache.inc cache_set($cid, $table = 'cache', $data, $expire = CACHE_PERMANENT, $headers = NULL)
6.x cache.inc cache_set($cid, $data, $table = 'cache', $expire = CACHE_PERMANENT, $headers = NULL)
6.x cache-install.inc cache_set($cid, $data, $table = 'cache', $expire = CACHE_PERMANENT, $headers = NULL)
7.x cache.inc cache_set($cid, $data, $bin = 'cache', $expire = CACHE_PERMANENT)

Store data in the persistent cache.


$cid: The cache ID of the data to store.

$data: The data to store in the cache. Complex data types must be serialized first.

$expire: One of the following values:

  • CACHE_PERMANENT: Indicates that the item should never be removed unless explicitly told to using cache_clear_all() with a cache ID.
  • CACHE_TEMPORARY: Indicates that the item should be removed at the next general cache wipe.
  • A Unix timestamp: Indicates that the item should be kept at least until the given time, after which it behaves like CACHE_TEMPORARY.

$headers: A string containing HTTP header information for cached pages.

4 calls to cache_set()
archive_calendar in modules/archive.module
Generates a monthly calendar, for display in the archive block.
check_markup in modules/filter.module
Run all the enabled filters on a piece of text.
locale_refresh_cache in modules/locale.module
Refreshes database stored cache of translations.
page_set_cache in includes/common.inc
Store the current page in the cache.


includes/bootstrap.inc, line 375
Functions that need to be loaded on every Drupal request.


function cache_set($cid, $data, $expire = CACHE_PERMANENT, $headers = NULL) {
  db_query("UPDATE {cache} SET data = %b, created = %d, expire = %d, headers = '%s' WHERE cid = '%s'", $data, time(), $expire, $headers, $cid);
  if (!db_affected_rows()) {
    @db_query("INSERT INTO {cache} (cid, data, created, expire, headers) VALUES ('%s', %b, %d, %d, '%s')", $cid, $data, time(), $expire, $headers);