function cache_clear_all in File Cache 5.5

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

Parameters

$cid: If set, the cache ID to delete. Otherwise, all cache entries that can expire are deleted.

$table: If set, the table $table to delete from. Mandatory argument if $cid is set.

$wildcard: If set to TRUE, the $cid is treated as a substring to match rather than a complete ID. The match is a right hand match. If '*' is given as $cid, the table $table will be emptied.

File

./filecache.inc, line 125

Code

function cache_clear_all($cid = NULL, $table = NULL, $wildcard = FALSE) {
  global $user;
  $path = variable_get('filecache_path', 'files/cache') . '/' . $table;
  if (!isset($cid) || !isset($table)) {
    cache_clear_all('*', !isset($table) ? 'cache_page' : $table);
    return;
  }
  if ($wildcard) {
    if (file_exists($path) && is_dir($path) && ($dir = opendir($path))) {
      if ($cid == '*') {
        $reg = '.*';
      }
      else {
        $reg = '^' . urlencode($cid);
      }
      while ($file = readdir($dir)) {
        if (!in_array($file, array(
          '.',
          '..',
        )) && ereg($reg, $file) !== FALSE && !is_dir($path . '/' . $file)) {
          unlink($path . '/' . $file);
        }
      }
    }
  }
  elseif (file_exists($path . '/' . urlencode($cid))) {
    unlink($path . '/' . urlencode($cid));
  }
}