function system_cron
7.x system.module | system_cron() |
6.x system.module | system_cron() |
Implementation of hook_cron().
Remove older rows from flood and batch table. Remove old temporary files.
File
- drupal-6.x/
modules/ system/ system.module, line 1311 - Configuration system that lets administrators modify the workings of the site.
Code
function system_cron() {
// Cleanup the flood.
db_query('DELETE FROM {flood} WHERE timestamp < %d', time() - 3600);
// Cleanup the batch table.
db_query('DELETE FROM {batch} WHERE timestamp < %d', time() - 864000);
// Remove temporary files that are older than DRUPAL_MAXIMUM_TEMP_FILE_AGE.
$result = db_query('SELECT * FROM {files} WHERE status = %d and timestamp < %d', FILE_STATUS_TEMPORARY, time() - DRUPAL_MAXIMUM_TEMP_FILE_AGE);
while ($file = db_fetch_object($result)) {
if (file_exists($file->filepath)) {
// If files that exist cannot be deleted, continue so the database remains
// consistent.
if (!file_delete($file->filepath)) {
watchdog('file system', 'Could not delete temporary file "%path" during garbage collection', array('%path' => $file->filepath), 'error');
continue;
}
}
db_query('DELETE FROM {files} WHERE fid = %d', $file->fid);
}
$core = array('cache', 'cache_block', 'cache_filter', 'cache_page', 'cache_form', 'cache_menu');
$cache_tables = array_merge(module_invoke_all('flush_caches'), $core);
foreach ($cache_tables as $table) {
cache_clear_all(NULL, $table);
}
}