function variable_del

Unsets a persistent variable.

Case-sensitivity of the variable_* functions depends on the database collation used. To avoid problems, always use lower case for persistent variable names.

Parameters

$name: The name of the variable to undefine.

See also

variable_get()

variable_set()

File

includes/bootstrap.inc, line 1333

Functions that need to be loaded on every Drupal request.

Code

function variable_del($name) {
  global $conf;
  db_delete('variable')
    ->condition('name', $name)
    ->execute();
  cache_clear_all('variables', 'cache_bootstrap');
  unset($conf[$name]);
}